<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:5dd10e04-238f-45e9-9647-50800d8cc5f2,g:70b79186-071b-4b49-99ae-e1a5b88f7732-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.rackspace.com/role/CoverPage" xlink:type="simple" xlink:href="rxt-20200930.xsd#CoverPage"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CoverPage" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="rxt-20200930.xsd#ConsolidatedBalanceSheetsUnaudited"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_fb8f3472-002f-4cfa-b91f-502d8f9dfe8b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_fb8f3472-002f-4cfa-b91f-502d8f9dfe8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_43baf411-501d-4047-9cb5-1a034a3c8a26" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_43baf411-501d-4047-9cb5-1a034a3c8a26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_8518c6c6-290a-438e-81d9-d401aad71779" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_8518c6c6-290a-438e-81d9-d401aad71779" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_35e26014-7257-4d49-8801-3ba13e4acdf1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_LiabilitiesCurrent_35e26014-7257-4d49-8801-3ba13e4acdf1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_FinancingObligationsNoncurrent_b8f338c7-f662-4a0e-abf6-9a234f212ed1" xlink:href="rxt-20200930.xsd#rxt_FinancingObligationsNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_rxt_FinancingObligationsNoncurrent_b8f338c7-f662-4a0e-abf6-9a234f212ed1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_ad52158f-1aae-4f4e-86b9-e6c40764f831" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_ad52158f-1aae-4f4e-86b9-e6c40764f831" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_d765c7a4-92d0-4668-a731-813f63cd20f0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_50606ca9-f6eb-45bb-a297-edf15ced1fcd" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_d765c7a4-92d0-4668-a731-813f63cd20f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_b39d5ef0-b01e-4bb3-8d03-937bf7a5bcae" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_f4e05e9b-b447-4218-9ed7-5e68f5764378" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b39d5ef0-b01e-4bb3-8d03-937bf7a5bcae" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_f4e05e9b-b447-4218-9ed7-5e68f5764378" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_91d1b0fe-46af-46f1-9a87-3b5688e424bb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b39d5ef0-b01e-4bb3-8d03-937bf7a5bcae" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_91d1b0fe-46af-46f1-9a87-3b5688e424bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_25f067a3-858c-4447-b09b-be08dbf7d113" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b39d5ef0-b01e-4bb3-8d03-937bf7a5bcae" xlink:to="loc_us-gaap_OtherAssetsCurrent_25f067a3-858c-4447-b09b-be08dbf7d113" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0de2148c-a459-45a6-8eb8-26f57bf4ce24" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_b39d5ef0-b01e-4bb3-8d03-937bf7a5bcae" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0de2148c-a459-45a6-8eb8-26f57bf4ce24" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_1383a0f6-0e4b-4956-a3ba-0c1471310db8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_1383a0f6-0e4b-4956-a3ba-0c1471310db8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_8f5a1e67-246c-435a-bbfa-95688e3f2d50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_InterestPayableCurrent_8f5a1e67-246c-435a-bbfa-95688e3f2d50" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_FinancingObligationsCurrent_0d493207-32f0-4bfa-ae27-aa97d8de716a" xlink:href="rxt-20200930.xsd#rxt_FinancingObligationsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_rxt_FinancingObligationsCurrent_0d493207-32f0-4bfa-ae27-aa97d8de716a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_ee24ee09-1011-466f-b98e-c56a91c625bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_ee24ee09-1011-466f-b98e-c56a91c625bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_29fa7ca8-38d3-4e47-b985-6fad1f607ef6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_29fa7ca8-38d3-4e47-b985-6fad1f607ef6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_658a2287-5e96-4331-9d79-a569ef789433" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_LongTermDebtCurrent_658a2287-5e96-4331-9d79-a569ef789433" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_76eab863-6613-4897-8308-855e2d2fd7fc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_76eab863-6613-4897-8308-855e2d2fd7fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_5040f1d7-1f8c-411c-a42b-25013807f0c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a5d0d8b5-6b86-494f-ab63-7e3c5584fb0e" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_5040f1d7-1f8c-411c-a42b-25013807f0c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_fbc1d410-6b19-4ba4-bec5-54df5d1e83a9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_fbc1d410-6b19-4ba4-bec5-54df5d1e83a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_4c5181b6-32e3-4a0f-86e5-5c38a4ac5124" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_4c5181b6-32e3-4a0f-86e5-5c38a4ac5124" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_7d4b501c-5142-4ea2-bbbb-14df92e9a4af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_AssetsCurrent_7d4b501c-5142-4ea2-bbbb-14df92e9a4af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_f35a8d25-d85e-4137-8390-d7f9416bd5cb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_f35a8d25-d85e-4137-8390-d7f9416bd5cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_128835e2-92fe-4f21-addb-0d6b60c253cc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_Goodwill_128835e2-92fe-4f21-addb-0d6b60c253cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8a4d0f38-c353-4c53-a34e-1328ea88bf11" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_526228c7-a655-428b-9af7-327c6f3eb5cf" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8a4d0f38-c353-4c53-a34e-1328ea88bf11" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_b8b8fea5-51c6-466b-9945-f93bf7ee944d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_b8b8fea5-51c6-466b-9945-f93bf7ee944d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_b207e6b6-2a85-4298-9c9d-447b06b97a81" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:to="loc_us-gaap_CommonStockValue_b207e6b6-2a85-4298-9c9d-447b06b97a81" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7f283d99-e441-42dd-a1d3-4b003dcf9d50" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_7f283d99-e441-42dd-a1d3-4b003dcf9d50" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_ce7ceafd-6030-4653-b42f-fd8d1fe0b283" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:to="loc_us-gaap_AdditionalPaidInCapital_ce7ceafd-6030-4653-b42f-fd8d1fe0b283" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_92d7e102-642a-444d-8174-6a3421b24381" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_98f4dcfc-8e57-4683-a657-818284e70f03" xlink:to="loc_us-gaap_PreferredStockValue_92d7e102-642a-444d-8174-6a3421b24381" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_000b8ea9-87df-4f2a-8500-580129d8fa9c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_000b8ea9-87df-4f2a-8500-580129d8fa9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_8546e1ac-f351-4ae7-a894-ffef5cb37987" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_CommonStockValue_8546e1ac-f351-4ae7-a894-ffef5cb37987" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_c737d9dc-bdbd-42a1-a613-73f8988924db" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_c737d9dc-bdbd-42a1-a613-73f8988924db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_940d0de1-a4a8-4784-9ba3-873007c16a79" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_AdditionalPaidInCapital_940d0de1-a4a8-4784-9ba3-873007c16a79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_99d00c26-b5c2-454b-96a3-2824835d22a8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_Liabilities_99d00c26-b5c2-454b-96a3-2824835d22a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_638d4b1c-ea8c-4433-8e46-09ce4eb3b635" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_PreferredStockValue_638d4b1c-ea8c-4433-8e46-09ce4eb3b635" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_6d90ea27-298e-4a59-b1c4-bbda0a3ac152" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_4c3bc30c-9608-4462-b694-65ddeda8e8d2" xlink:to="loc_us-gaap_CommitmentsAndContingencies_6d90ea27-298e-4a59-b1c4-bbda0a3ac152" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="rxt-20200930.xsd#ConsolidatedBalanceSheetsUnauditedParenthetical"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ConsolidatedStatementsofComprehensiveLossUnaudited" xlink:type="simple" xlink:href="rxt-20200930.xsd#ConsolidatedStatementsofComprehensiveLossUnaudited"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ConsolidatedStatementsofComprehensiveLossUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_fd4258b0-04a3-4ba4-87d2-d6f8ccce19ca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a75303e4-d898-452c-8279-c7f6da70254f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_fd4258b0-04a3-4ba4-87d2-d6f8ccce19ca" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a75303e4-d898-452c-8279-c7f6da70254f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_90052685-ee3d-4925-ad48-af862726c711" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_fd4258b0-04a3-4ba4-87d2-d6f8ccce19ca" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_90052685-ee3d-4925-ad48-af862726c711" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_ca961184-2e5f-4990-82ae-33b1feee64a4" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_bba4442e-343b-46e2-bf86-54e0d07658e6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_ca961184-2e5f-4990-82ae-33b1feee64a4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_bba4442e-343b-46e2-bf86-54e0d07658e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_2b7eb2d4-eb27-4495-8655-ca7ce17a6588" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_ca961184-2e5f-4990-82ae-33b1feee64a4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_2b7eb2d4-eb27-4495-8655-ca7ce17a6588" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_60c9fc54-1b54-47f3-977f-1e1ddb27d81a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_ca961184-2e5f-4990-82ae-33b1feee64a4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_60c9fc54-1b54-47f3-977f-1e1ddb27d81a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_03208384-fed6-4c9a-b04a-ebaf87af951b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_d590a00e-3874-4181-88fe-aef5b26890f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_03208384-fed6-4c9a-b04a-ebaf87af951b" xlink:to="loc_us-gaap_OperatingIncomeLoss_d590a00e-3874-4181-88fe-aef5b26890f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_86ed3ef0-43d3-49b8-afe9-fca06f2e51f1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_03208384-fed6-4c9a-b04a-ebaf87af951b" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_86ed3ef0-43d3-49b8-afe9-fca06f2e51f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_d285e26c-dd56-4da7-bad3-3de99e422e82" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_96a8d647-6f32-4b54-b8d5-4482b83f8bf2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_d285e26c-dd56-4da7-bad3-3de99e422e82" xlink:to="loc_us-gaap_CostOfRevenue_96a8d647-6f32-4b54-b8d5-4482b83f8bf2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e7edf030-ccfb-4878-9dfd-f4d1ae97ae62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_d285e26c-dd56-4da7-bad3-3de99e422e82" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e7edf030-ccfb-4878-9dfd-f4d1ae97ae62" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_f7b1a2c1-e3f8-4dd6-9623-bbd564956cfc" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_2e8ebda1-8fbb-4418-8d26-31b3a074bc8a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f7b1a2c1-e3f8-4dd6-9623-bbd564956cfc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_2e8ebda1-8fbb-4418-8d26-31b3a074bc8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_ae188ce5-e3f0-4b51-bcab-331566cdd964" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f7b1a2c1-e3f8-4dd6-9623-bbd564956cfc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_ae188ce5-e3f0-4b51-bcab-331566cdd964" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_5e34a699-ae58-48b9-a757-87db0ef1ca95" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f7b1a2c1-e3f8-4dd6-9623-bbd564956cfc" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_5e34a699-ae58-48b9-a757-87db0ef1ca95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_30a54314-97fd-49ba-a5eb-9897f8e81b76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f7b1a2c1-e3f8-4dd6-9623-bbd564956cfc" xlink:to="loc_us-gaap_NetIncomeLoss_30a54314-97fd-49ba-a5eb-9897f8e81b76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_5dacac7c-dc00-4a9c-83e3-4fbb9de76bff" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_c342f80b-0023-4d61-82b6-548f3081b440" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5dacac7c-dc00-4a9c-83e3-4fbb9de76bff" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_c342f80b-0023-4d61-82b6-548f3081b440" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_149e5d9c-e29a-44b7-a698-bc803a1d05bf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5dacac7c-dc00-4a9c-83e3-4fbb9de76bff" xlink:to="loc_us-gaap_InterestExpense_149e5d9c-e29a-44b7-a698-bc803a1d05bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_78f4055e-5ad3-427c-9e0d-caf790e3d43d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5dacac7c-dc00-4a9c-83e3-4fbb9de76bff" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_78f4055e-5ad3-427c-9e0d-caf790e3d43d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_1d185f82-0601-4626-afd2-2fb2720b47ac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_5dacac7c-dc00-4a9c-83e3-4fbb9de76bff" xlink:to="loc_us-gaap_GainLossOnInvestments_1d185f82-0601-4626-afd2-2fb2720b47ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_d6b085f9-c57a-4a7e-a515-7255ad5b099b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a356d1e9-3e80-45bc-9adb-8fb3fcc69c34" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_d6b085f9-c57a-4a7e-a515-7255ad5b099b" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_a356d1e9-3e80-45bc-9adb-8fb3fcc69c34" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_975edcf6-4ab4-484d-a8ac-f2d7bd55b72a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_d6b085f9-c57a-4a7e-a515-7255ad5b099b" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_975edcf6-4ab4-484d-a8ac-f2d7bd55b72a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_bf281885-0429-490c-b2d2-2b34f9240f8f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_d6b085f9-c57a-4a7e-a515-7255ad5b099b" xlink:to="loc_us-gaap_GrossProfit_bf281885-0429-490c-b2d2-2b34f9240f8f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="rxt-20200930.xsd#ConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5f597c3c-a768-4c9f-bd59-c3dda49cceca" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_39e4eb21-8725-4f11-bc2e-66aadc4b5eef" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5f597c3c-a768-4c9f-bd59-c3dda49cceca" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_39e4eb21-8725-4f11-bc2e-66aadc4b5eef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_e05fd4a7-0213-4e37-87dd-e83e55b8b3f2" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5f597c3c-a768-4c9f-bd59-c3dda49cceca" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_e05fd4a7-0213-4e37-87dd-e83e55b8b3f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_02755b21-3132-4f6c-ba4a-756d3193688f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5f597c3c-a768-4c9f-bd59-c3dda49cceca" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_02755b21-3132-4f6c-ba4a-756d3193688f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_bfd64363-08b0-485a-8f6b-b8f135db60df" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_bfd64363-08b0-485a-8f6b-b8f135db60df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_9a5fef4b-132a-4f29-84e3-5561f06d7aab" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_9a5fef4b-132a-4f29-84e3-5561f06d7aab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_1f5a6af6-33bd-4d64-89b0-da92c60c6ede" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_1f5a6af6-33bd-4d64-89b0-da92c60c6ede" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1c18f4db-439b-425f-914c-b5568854e254" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1c18f4db-439b-425f-914c-b5568854e254" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_ee407ceb-2f7e-4b49-aaaa-b66c88af1898" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_ee407ceb-2f7e-4b49-aaaa-b66c88af1898" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_41170e4d-c131-40a1-98c6-c375cf4078af" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_41170e4d-c131-40a1-98c6-c375cf4078af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_676e906b-d747-4e91-84dc-d65127f17395" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_676e906b-d747-4e91-84dc-d65127f17395" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_49c23ac2-4af1-41db-9ff8-0e1ed6b44ffb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_49c23ac2-4af1-41db-9ff8-0e1ed6b44ffb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_9751ed5d-e1a6-4bf3-a159-636009c1e1da" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_9751ed5d-e1a6-4bf3-a159-636009c1e1da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_decc17ab-4187-4953-a61c-f25d4f7f0b1a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_decc17ab-4187-4953-a61c-f25d4f7f0b1a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_9a478287-110a-4a9f-9ed2-de5b0882fe18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_9a478287-110a-4a9f-9ed2-de5b0882fe18" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_6d0639ae-d821-48e8-ae85-e155786276a8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_ShareBasedCompensation_6d0639ae-d821-48e8-ae85-e155786276a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_3b286d67-2e7c-467c-9124-83ce0753d8a5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_3b286d67-2e7c-467c-9124-83ce0753d8a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_de61bede-3a8f-4cde-b2f6-373c53610bf0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_de61bede-3a8f-4cde-b2f6-373c53610bf0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDepreciationAndAmortization_0fb98e36-c0ea-42be-8ab5-4974c1c9c6ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherDepreciationAndAmortization"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_OtherDepreciationAndAmortization_0fb98e36-c0ea-42be-8ab5-4974c1c9c6ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_190931e9-2a8b-47cd-aba0-3b61283d7074" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_GainLossOnInvestments_190931e9-2a8b-47cd-aba0-3b61283d7074" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c092e3b4-bf1f-4e60-9899-d526672acf76" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_us-gaap_NetIncomeLoss_c092e3b4-bf1f-4e60-9899-d526672acf76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_IncreaseDecreaseInOperatingLeaseLiabilities_e743d736-993b-4ab3-90bf-c99fb2e6bc0f" xlink:href="rxt-20200930.xsd#rxt_IncreaseDecreaseInOperatingLeaseLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_6ed9ea04-f9c8-4253-998c-1106ff47fa73" xlink:to="loc_rxt_IncreaseDecreaseInOperatingLeaseLiabilities_e743d736-993b-4ab3-90bf-c99fb2e6bc0f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_NoncashPurchaseOfCapitalExpenditures_4039cdfe-ba3d-47c0-8a8a-1227c737815e" xlink:href="rxt-20200930.xsd#rxt_NoncashPurchaseOfCapitalExpenditures"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_CapitalExpendituresAcquiredByFinanceLeases_82ec571d-4f8d-4a53-8e94-29446bdc8567" xlink:href="rxt-20200930.xsd#rxt_CapitalExpendituresAcquiredByFinanceLeases"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rxt_NoncashPurchaseOfCapitalExpenditures_4039cdfe-ba3d-47c0-8a8a-1227c737815e" xlink:to="loc_rxt_CapitalExpendituresAcquiredByFinanceLeases_82ec571d-4f8d-4a53-8e94-29446bdc8567" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_CapitalExpendituresAcquiredByFinancingObligations_aee2b016-ae71-408b-9afa-66121c6b058e" xlink:href="rxt-20200930.xsd#rxt_CapitalExpendituresAcquiredByFinancingObligations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rxt_NoncashPurchaseOfCapitalExpenditures_4039cdfe-ba3d-47c0-8a8a-1227c737815e" xlink:to="loc_rxt_CapitalExpendituresAcquiredByFinancingObligations_aee2b016-ae71-408b-9afa-66121c6b058e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_IncreaseDecreaseInAccruedLiabilitiesForCapitalExpenditures_b1b3216a-cf85-4e8a-b9fb-423fc3011f86" xlink:href="rxt-20200930.xsd#rxt_IncreaseDecreaseInAccruedLiabilitiesForCapitalExpenditures"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_rxt_NoncashPurchaseOfCapitalExpenditures_4039cdfe-ba3d-47c0-8a8a-1227c737815e" xlink:to="loc_rxt_IncreaseDecreaseInAccruedLiabilitiesForCapitalExpenditures_b1b3216a-cf85-4e8a-b9fb-423fc3011f86" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_63eb3168-3e73-4032-bcc5-9903893f9421" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_63eb3168-3e73-4032-bcc5-9903893f9421" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_fbb46107-3e94-409e-b6f1-5e0c3d3745cd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_fbb46107-3e94-409e-b6f1-5e0c3d3745cd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_RepaymentsOfFinancingObligations_7933bb7f-4604-4caf-8f9d-b519b03e8818" xlink:href="rxt-20200930.xsd#rxt_RepaymentsOfFinancingObligations"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_rxt_RepaymentsOfFinancingObligations_7933bb7f-4604-4caf-8f9d-b519b03e8818" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_57dd2092-d1f0-4c2e-85a8-1d267e08115d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_57dd2092-d1f0-4c2e-85a8-1d267e08115d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_a4f28ccb-c377-4d8b-951d-01019a4fdbed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_a4f28ccb-c377-4d8b-951d-01019a4fdbed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_ProceedsFromFinancingObligations_ff1be490-a239-44c1-91b6-ed27cacd5c37" xlink:href="rxt-20200930.xsd#rxt_ProceedsFromFinancingObligations"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_rxt_ProceedsFromFinancingObligations_ff1be490-a239-44c1-91b6-ed27cacd5c37" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_3261206b-0d98-4d8b-a36e-39071bb418d6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_3261206b-0d98-4d8b-a36e-39071bb418d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_d158e093-6888-4f0d-bc11-0a0b77404526" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_d158e093-6888-4f0d-bc11-0a0b77404526" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1a39f480-a8dd-4477-8037-cf11e4aa6e67" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_1a39f480-a8dd-4477-8037-cf11e4aa6e67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_PaymentsUsedToSettleShareBasedPaymentAward_19d6e330-fc1e-4136-8a4e-4b91f3177c8b" xlink:href="rxt-20200930.xsd#rxt_PaymentsUsedToSettleShareBasedPaymentAward"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_rxt_PaymentsUsedToSettleShareBasedPaymentAward_19d6e330-fc1e-4136-8a4e-4b91f3177c8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockPlans_d0ab55ee-b239-444a-9753-920d5575ea4f" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromStockPlans"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_74240ae2-1149-405e-baef-a6e6e9795af0" xlink:to="loc_us-gaap_ProceedsFromStockPlans_d0ab55ee-b239-444a-9753-920d5575ea4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1fa2fc8c-6ef9-4d24-ac22-e7d0eeedd5f9" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_98956045-28b9-4b6b-ab3a-37d68f9aec53" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1fa2fc8c-6ef9-4d24-ac22-e7d0eeedd5f9" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_98956045-28b9-4b6b-ab3a-37d68f9aec53" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_753ab010-59c9-45bd-98ad-5ff79b4342e7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1fa2fc8c-6ef9-4d24-ac22-e7d0eeedd5f9" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_753ab010-59c9-45bd-98ad-5ff79b4342e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_51264f88-e523-4d75-ac16-7a4311102cd8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_04acd45e-7e25-4768-a141-a0aba84890d5" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_51264f88-e523-4d75-ac16-7a4311102cd8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_04acd45e-7e25-4768-a141-a0aba84890d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_63fffe06-27fa-4516-aefd-b750eb2cfdac" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_51264f88-e523-4d75-ac16-7a4311102cd8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_63fffe06-27fa-4516-aefd-b750eb2cfdac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7ff5ec57-b6e6-44ad-9bfb-d16d7e95e8f3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_51264f88-e523-4d75-ac16-7a4311102cd8" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_7ff5ec57-b6e6-44ad-9bfb-d16d7e95e8f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_374c1727-7296-445d-971d-8c72e874c29d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_51264f88-e523-4d75-ac16-7a4311102cd8" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_374c1727-7296-445d-971d-8c72e874c29d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/ConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="simple" xlink:href="rxt-20200930.xsd#ConsolidatedStatementsofStockholdersEquityUnaudited"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ConsolidatedStatementsofStockholdersEquityUnaudited" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="rxt-20200930.xsd#CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPolicies"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="rxt-20200930.xsd#CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CompanyOverviewBasisofPresentationandSummaryofSignificantAccountingPoliciesNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContracts" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContracts"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContracts" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsScheduleofBalancesRelatedtoCustomerContractsDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsScheduleofBalancesRelatedtoCustomerContractsDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsScheduleofBalancesRelatedtoCustomerContractsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsScheduleofAmortizationofCapitalizedContractCostsDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsScheduleofAmortizationofCapitalizedContractCostsDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsScheduleofAmortizationofCapitalizedContractCostsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsRemainingPerformanceObligationsDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsRemainingPerformanceObligationsDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsRemainingPerformanceObligationsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CustomerContractsRemainingPerformanceObligationsDetails_1" xlink:type="simple" xlink:href="rxt-20200930.xsd#CustomerContractsRemainingPerformanceObligationsDetails_1"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CustomerContractsRemainingPerformanceObligationsDetails_1" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/NetLossPerShare" xlink:type="simple" xlink:href="rxt-20200930.xsd#NetLossPerShare"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/NetLossPerShare" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/NetLossPerShareTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#NetLossPerShareTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/NetLossPerShareTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/NetLossPerShareComputationofBasicandDilutedNetIncomeLossperShareDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#NetLossPerShareComputationofBasicandDilutedNetIncomeLossperShareDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/NetLossPerShareComputationofBasicandDilutedNetIncomeLossperShareDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/NetLossPerShareNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#NetLossPerShareNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/NetLossPerShareNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenet" xlink:type="simple" xlink:href="rxt-20200930.xsd#PropertyEquipmentandSoftwarenet"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenet" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenetTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#PropertyEquipmentandSoftwarenetTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenetTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenetScheduleofPropertyEquipmentandSoftwarenetDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#PropertyEquipmentandSoftwarenetScheduleofPropertyEquipmentandSoftwarenetDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/PropertyEquipmentandSoftwarenetScheduleofPropertyEquipmentandSoftwarenetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_d0c7cfbf-4559-48c0-a1a7-9aff68eaed6d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_78dc9a1c-4017-439c-bdbe-ac56a1f5cd29" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_d0c7cfbf-4559-48c0-a1a7-9aff68eaed6d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_78dc9a1c-4017-439c-bdbe-ac56a1f5cd29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortizationExcludingConstructionInProgress_75d5bf1c-c456-4b32-869d-b403c1e34337" xlink:href="rxt-20200930.xsd#rxt_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortizationExcludingConstructionInProgress"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_d0c7cfbf-4559-48c0-a1a7-9aff68eaed6d" xlink:to="loc_rxt_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortizationExcludingConstructionInProgress_75d5bf1c-c456-4b32-869d-b403c1e34337" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_1f582ed9-72e5-4ec6-ba50-b86e20b6189d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_d0c7cfbf-4559-48c0-a1a7-9aff68eaed6d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_1f582ed9-72e5-4ec6-ba50-b86e20b6189d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/GoodwillandIntangibleAssets" xlink:type="simple" xlink:href="rxt-20200930.xsd#GoodwillandIntangibleAssets"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/GoodwillandIntangibleAssets" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/GoodwillandIntangibleAssetsTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#GoodwillandIntangibleAssetsTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/GoodwillandIntangibleAssetsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/GoodwillandIntangibleAssetsChangesinCarryingAmountsofGoodwillbyReportableSegmentDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#GoodwillandIntangibleAssetsChangesinCarryingAmountsofGoodwillbyReportableSegmentDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/GoodwillandIntangibleAssetsChangesinCarryingAmountsofGoodwillbyReportableSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_da44f040-7cc6-4529-b199-9d248257c2ed" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_f3e7ab3e-1351-415c-b66a-0279647492c6" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Goodwill_da44f040-7cc6-4529-b199-9d248257c2ed" xlink:to="loc_us-gaap_GoodwillGross_f3e7ab3e-1351-415c-b66a-0279647492c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_9d535478-e913-4e11-982d-02ca141e627c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Goodwill_da44f040-7cc6-4529-b199-9d248257c2ed" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_9d535478-e913-4e11-982d-02ca141e627c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_aa5789c2-6caf-40e5-af30-a19e51b5973c" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_57318d1d-fd7b-4a4e-9124-49cf389a2ac7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_aa5789c2-6caf-40e5-af30-a19e51b5973c" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_57318d1d-fd7b-4a4e-9124-49cf389a2ac7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_383771a0-fbe9-47a8-b3e4-8f54ac6f8532" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_aa5789c2-6caf-40e5-af30-a19e51b5973c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_383771a0-fbe9-47a8-b3e4-8f54ac6f8532" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f6d09672-6ecb-4f43-a912-18e09849de62" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_3c4f6575-53c7-4fd6-bb72-f46ded23196d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f6d09672-6ecb-4f43-a912-18e09849de62" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_3c4f6575-53c7-4fd6-bb72-f46ded23196d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_838ba94b-083c-4688-acbe-0875131118f7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f6d09672-6ecb-4f43-a912-18e09849de62" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_838ba94b-083c-4688-acbe-0875131118f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e69d5113-c876-4e12-a962-4d0a5be33958" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_795f1148-9d08-4f65-904e-eac7831e46a7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e69d5113-c876-4e12-a962-4d0a5be33958" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_795f1148-9d08-4f65-904e-eac7831e46a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_9a2651b2-e541-4707-acae-78bc6e8279ba" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_e69d5113-c876-4e12-a962-4d0a5be33958" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_9a2651b2-e541-4707-acae-78bc6e8279ba" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails_1" xlink:type="simple" xlink:href="rxt-20200930.xsd#GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails_1"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/GoodwillandIntangibleAssetsIntangibleAssetsOtherThanGoodwillDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c4a32226-9a39-4e1a-a7af-23647149cfc8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_a0f70d31-00e0-4a5f-8406-1562a99b8400" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsGrossExcludingGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c4a32226-9a39-4e1a-a7af-23647149cfc8" xlink:to="loc_us-gaap_IntangibleAssetsGrossExcludingGoodwill_a0f70d31-00e0-4a5f-8406-1562a99b8400" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e4ef2bbe-bfe0-470b-90ac-cfe3a0ca66a0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_c4a32226-9a39-4e1a-a7af-23647149cfc8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_e4ef2bbe-bfe0-470b-90ac-cfe3a0ca66a0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/Investments" xlink:type="simple" xlink:href="rxt-20200930.xsd#Investments"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Investments" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/InvestmentsNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#InvestmentsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_416d8604-f970-4ee3-8ac0-daaeb1d7f90e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_297ad666-dfcf-4ea5-a586-e14f10e85aa7" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnInvestments_416d8604-f970-4ee3-8ac0-daaeb1d7f90e" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_297ad666-dfcf-4ea5-a586-e14f10e85aa7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_f12c6255-70b2-4156-9792-df28ff71a391" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnInvestments_416d8604-f970-4ee3-8ac0-daaeb1d7f90e" xlink:to="loc_us-gaap_RealizedInvestmentGainsLosses_f12c6255-70b2-4156-9792-df28ff71a391" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/Debt" xlink:type="simple" xlink:href="rxt-20200930.xsd#Debt"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Debt" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DebtTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#DebtTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DebtTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DebtScheduleofDebtDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DebtScheduleofDebtDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DebtScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_b437a3a9-42d7-4b3c-9bd0-425aca4e1045" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_b1fa5800-3401-4ef4-ada9-faabf38ba6e1" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_b437a3a9-42d7-4b3c-9bd0-425aca4e1045" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_b1fa5800-3401-4ef4-ada9-faabf38ba6e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_760e12eb-cf80-420f-8fa1-fe9e80ab6b18" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_b437a3a9-42d7-4b3c-9bd0-425aca4e1045" xlink:to="loc_us-gaap_LongTermDebtCurrent_760e12eb-cf80-420f-8fa1-fe9e80ab6b18" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/DebtScheduleofDebtDetails_1" xlink:type="simple" xlink:href="rxt-20200930.xsd#DebtScheduleofDebtDetails_1"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DebtScheduleofDebtDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_07c92aa0-788f-4be9-8dcb-f959359f8153" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_a2e90024-e6a1-4de7-80e8-3308a8bfe8f8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_07c92aa0-788f-4be9-8dcb-f959359f8153" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_a2e90024-e6a1-4de7-80e8-3308a8bfe8f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_ab25feeb-d3cf-452d-a12a-9d7ec79452d3" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_07c92aa0-788f-4be9-8dcb-f959359f8153" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_ab25feeb-d3cf-452d-a12a-9d7ec79452d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_c180f154-799f-46e1-94da-925885e86347" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_07c92aa0-788f-4be9-8dcb-f959359f8153" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_c180f154-799f-46e1-94da-925885e86347" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DebtNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DebtNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/CommitmentandContingencies" xlink:type="simple" xlink:href="rxt-20200930.xsd#CommitmentandContingencies"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/CommitmentandContingencies" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwards" xlink:type="simple" xlink:href="rxt-20200930.xsd#ShareBasedCompensationandSettlementofShareBasedAwards"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwards" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#ShareBasedCompensationandSettlementofShareBasedAwardsTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#ShareBasedCompensationandSettlementofShareBasedAwardsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsScheduleofShareBasedCompensationExpenseRecognizedUndertheIncentivePlanDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#ShareBasedCompensationandSettlementofShareBasedAwardsScheduleofShareBasedCompensationExpenseRecognizedUndertheIncentivePlanDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/ShareBasedCompensationandSettlementofShareBasedAwardsScheduleofShareBasedCompensationExpenseRecognizedUndertheIncentivePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_4463420b-1c56-45af-98d9-e64f275e0a2b" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ec092245-5dbe-436c-a90d-35002b54b8bd" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_4463420b-1c56-45af-98d9-e64f275e0a2b" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ec092245-5dbe-436c-a90d-35002b54b8bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_bce73dbb-59e6-4978-ae13-408bc4e9ebdb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_4463420b-1c56-45af-98d9-e64f275e0a2b" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_bce73dbb-59e6-4978-ae13-408bc4e9ebdb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/Taxes" xlink:type="simple" xlink:href="rxt-20200930.xsd#Taxes"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Taxes" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/TaxesNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#TaxesNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/TaxesNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/Derivatives" xlink:type="simple" xlink:href="rxt-20200930.xsd#Derivatives"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Derivatives" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DerivativesTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#DerivativesTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DerivativesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DerivativesNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DerivativesNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DerivativesNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DerivativesScheduleofFairValuesofDerivativesontheConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DerivativesScheduleofFairValuesofDerivativesontheConsolidatedBalanceSheetsDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DerivativesScheduleofFairValuesofDerivativesontheConsolidatedBalanceSheetsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DerivativesDerivativesPresentedonaNetAssetandNetLiabilitybasisDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DerivativesDerivativesPresentedonaNetAssetandNetLiabilitybasisDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DerivativesDerivativesPresentedonaNetAssetandNetLiabilitybasisDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DerivativesEffectofDerivativesontheConsolidatedStatementsofComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DerivativesEffectofDerivativesontheConsolidatedStatementsofComprehensiveIncomeLossDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DerivativesEffectofDerivativesontheConsolidatedStatementsofComprehensiveIncomeLossDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/Divestitures" xlink:type="simple" xlink:href="rxt-20200930.xsd#Divestitures"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Divestitures" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/DivestituresNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#DivestituresNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/DivestituresNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/Acquisitions" xlink:type="simple" xlink:href="rxt-20200930.xsd#Acquisitions"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/Acquisitions" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/AcquisitionsTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#AcquisitionsTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AcquisitionsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/AcquisitionsNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#AcquisitionsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_fd290cee-b8c8-4b7a-b2ac-563ec95ac3cf" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_6deb0618-18a7-4342-8333-adb1257ca60a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_fd290cee-b8c8-4b7a-b2ac-563ec95ac3cf" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_6deb0618-18a7-4342-8333-adb1257ca60a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_6078dac4-24d0-4994-95ed-520f3719ef28" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAcquiredFromAcquisition"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_fd290cee-b8c8-4b7a-b2ac-563ec95ac3cf" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_6078dac4-24d0-4994-95ed-520f3719ef28" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/AcquisitionsScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#AcquisitionsScheduleofPreliminaryPurchasePriceAllocationDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AcquisitionsScheduleofPreliminaryPurchasePriceAllocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_26e21460-cce2-4ade-91fc-13b03720264a" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_c0bd6fdc-aa75-40ea-97da-768ade9ccce8" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_26e21460-cce2-4ade-91fc-13b03720264a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_c0bd6fdc-aa75-40ea-97da-768ade9ccce8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_rxt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAssumedNetOfOtherAssetsAcquired_a68dd998-aa73-4ace-9e0a-035d10a7fb4a" xlink:href="rxt-20200930.xsd#rxt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAssumedNetOfOtherAssetsAcquired"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_26e21460-cce2-4ade-91fc-13b03720264a" xlink:to="loc_rxt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAssumedNetOfOtherAssetsAcquired_a68dd998-aa73-4ace-9e0a-035d10a7fb4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_882e16c4-9216-4c73-ad6d-c2acb19acd8e" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_26e21460-cce2-4ade-91fc-13b03720264a" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_882e16c4-9216-4c73-ad6d-c2acb19acd8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_03603a37-8371-45c0-a577-edceadbfee2d" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_080edf4b-df96-40bc-9842-72fedb1da1fb" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_03603a37-8371-45c0-a577-edceadbfee2d" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_080edf4b-df96-40bc-9842-72fedb1da1fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_3f8a87da-c540-4005-9d19-168da67fc9d0" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_03603a37-8371-45c0-a577-edceadbfee2d" xlink:to="loc_us-gaap_Goodwill_3f8a87da-c540-4005-9d19-168da67fc9d0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.rackspace.com/role/AcquisitionsScheduleofAdjustmentstothePreliminaryAllocationDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#AcquisitionsScheduleofAdjustmentstothePreliminaryAllocationDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AcquisitionsScheduleofAdjustmentstothePreliminaryAllocationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" xlink:href="rxt-20200930.xsd#AccumulatedOtherComprehensiveIncomeLoss"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#AccumulatedOtherComprehensiveIncomeLossTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#AccumulatedOtherComprehensiveIncomeLossScheduleofAccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/RelatedPartyTransactions" xlink:type="simple" xlink:href="rxt-20200930.xsd#RelatedPartyTransactions"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/RelatedPartyTransactions" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#RelatedPartyTransactionsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/RelatedPartyTransactionsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/SegmentReporting" xlink:type="simple" xlink:href="rxt-20200930.xsd#SegmentReporting"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/SegmentReporting" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/SegmentReportingTables" xlink:type="simple" xlink:href="rxt-20200930.xsd#SegmentReportingTables"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/SegmentReportingTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/SegmentReportingNarrativeDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#SegmentReportingNarrativeDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/SegmentReportingNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://www.rackspace.com/role/SegmentReportingReconciliationofRevenueandGrossProfitsfromSegmentstoConsolidatedDetails" xlink:type="simple" xlink:href="rxt-20200930.xsd#SegmentReportingReconciliationofRevenueandGrossProfitsfromSegmentstoConsolidatedDetails"/>
  <link:calculationLink xlink:role="http://www.rackspace.com/role/SegmentReportingReconciliationofRevenueandGrossProfitsfromSegmentstoConsolidatedDetails" xlink:type="extended"/>
</link:linkbase>
