<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" 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">
  <link:roleRef roleURI="http://www.commvault.com/role/AccruedLiabilities" xlink:href="cvlt-20170331.xsd#AccruedLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/AccruedLiabilitiesDetail" xlink:href="cvlt-20170331.xsd#AccruedLiabilitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/AccruedLiabilitiesTables" xlink:href="cvlt-20170331.xsd#AccruedLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/Capitalization" xlink:href="cvlt-20170331.xsd#Capitalization" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/CapitalizationAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#CapitalizationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/CommitmentsAndContingencies" xlink:href="cvlt-20170331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/CommitmentsAndContingenciesFutureMinimumLeasePaymentsUnderAllOperatingLeasesDetail" xlink:href="cvlt-20170331.xsd#CommitmentsAndContingenciesFutureMinimumLeasePaymentsUnderAllOperatingLeasesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/CommitmentsAndContingenciesTables" xlink:href="cvlt-20170331.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedBalanceSheets" xlink:href="cvlt-20170331.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="cvlt-20170331.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="cvlt-20170331.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:href="cvlt-20170331.xsd#ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedStatementsOfIncome" xlink:href="cvlt-20170331.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="cvlt-20170331.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/DocumentAndEntityInformation" xlink:href="cvlt-20170331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/EmployeeBenefitPlan" xlink:href="cvlt-20170331.xsd#EmployeeBenefitPlan" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/EmployeeBenefitPlanAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#EmployeeBenefitPlanAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxes" xlink:href="cvlt-20170331.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesComponentsOfDeferredTaxAssetsDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesComponentsOfDeferredTaxAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesComponentsOfIncomeBeforeIncomeTaxesDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesComponentsOfIncomeBeforeIncomeTaxesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesReconciliationOfAmountsOfUnrecognizedTaxBenefitsDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesReconciliationOfAmountsOfUnrecognizedTaxBenefitsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesReconciliationOfStatutoryTaxRatesAndEffectiveTaxRatesDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesReconciliationOfStatutoryTaxRatesAndEffectiveTaxRatesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesScheduleOfTaxYearsSubjectToIncomeTaxExaminationDetail" xlink:href="cvlt-20170331.xsd#IncomeTaxesScheduleOfTaxYearsSubjectToIncomeTaxExaminationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/IncomeTaxesTables" xlink:href="cvlt-20170331.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/NatureOfBusiness" xlink:href="cvlt-20170331.xsd#NatureOfBusiness" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/PropertyAndEquipment" xlink:href="cvlt-20170331.xsd#PropertyAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/PropertyAndEquipmentAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#PropertyAndEquipmentAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/PropertyAndEquipmentDetail" xlink:href="cvlt-20170331.xsd#PropertyAndEquipmentDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/PropertyAndEquipmentTables" xlink:href="cvlt-20170331.xsd#PropertyAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/RevolvingCreditFacility" xlink:href="cvlt-20170331.xsd#RevolvingCreditFacility" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/RevolvingCreditFacilityAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#RevolvingCreditFacilityAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:href="cvlt-20170331.xsd#ScheduleIiValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/ScheduleIiValuationAndQualifyingAccountsDetail" xlink:href="cvlt-20170331.xsd#ScheduleIiValuationAndQualifyingAccountsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SegmentInformation" xlink:href="cvlt-20170331.xsd#SegmentInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SegmentInformationAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#SegmentInformationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SegmentInformationScheduleOfLongLivedAssetsByGeographicAreaDetail" xlink:href="cvlt-20170331.xsd#SegmentInformationScheduleOfLongLivedAssetsByGeographicAreaDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SegmentInformationScheduleOfRevenueByGeographicAreaDetail" xlink:href="cvlt-20170331.xsd#SegmentInformationScheduleOfRevenueByGeographicAreaDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SegmentInformationTables" xlink:href="cvlt-20170331.xsd#SegmentInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:href="cvlt-20170331.xsd#SelectedQuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnauditedDetail" xlink:href="cvlt-20170331.xsd#SelectedQuarterlyFinancialDataUnauditedDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:href="cvlt-20170331.xsd#SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlans" xlink:href="cvlt-20170331.xsd#StockPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansActivityForCompanysTwoStockIncentivePlansDetail" xlink:href="cvlt-20170331.xsd#StockPlansActivityForCompanysTwoStockIncentivePlansDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#StockPlansAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansAssumptionsUsedInBlackScholesOptionPricingModelDetail" xlink:href="cvlt-20170331.xsd#StockPlansAssumptionsUsedInBlackScholesOptionPricingModelDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansEmployeeStockPurchasePlanDetails" xlink:href="cvlt-20170331.xsd#StockPlansEmployeeStockPurchasePlanDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansPerformanceBasedAndMarketBasedAwardsDetails" xlink:href="cvlt-20170331.xsd#StockPlansPerformanceBasedAndMarketBasedAwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansRestrictedStockUnitActivityDetail" xlink:href="cvlt-20170331.xsd#StockPlansRestrictedStockUnitActivityDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansStockBasedCompensationExpenseDetail" xlink:href="cvlt-20170331.xsd#StockPlansStockBasedCompensationExpenseDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansSummaryOfStockOptionsOutstandingUnderPlanAndLtipDetail" xlink:href="cvlt-20170331.xsd#StockPlansSummaryOfStockOptionsOutstandingUnderPlanAndLtipDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/StockPlansTables" xlink:href="cvlt-20170331.xsd#StockPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesComputationOfBasicAndDilutedNetIncomePerCommonShareDetail" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesComputationOfBasicAndDilutedNetIncomePerCommonShareDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesDeferredRevenueDetail" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesDeferredRevenueDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IDetails" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IiDetails" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IiDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfFairValueOfFinancialAssetsDetail" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfFairValueOfFinancialAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfPotentialOutstandingCommonStockEquivalentsDetail" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesSummaryOfPotentialOutstandingCommonStockEquivalentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="cvlt-20170331.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/AccruedLiabilities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/AccruedLiabilitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_5d282ae3-596f-c070-22d1-9efd66f22c6b" xlink:type="locator" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_AccruedCompensationAndRelatedPayrollTax" xlink:label="loc_cvlt_AccruedCompensationAndRelatedPayrollTax_5232d07a-32ff-852b-11d3-4483322f0600" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_5d282ae3-596f-c070-22d1-9efd66f22c6b" xlink:to="loc_cvlt_AccruedCompensationAndRelatedPayrollTax_5232d07a-32ff-852b-11d3-4483322f0600" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_b778d29a-2dae-9bba-0508-ec785327e629" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_5d282ae3-596f-c070-22d1-9efd66f22c6b" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_b778d29a-2dae-9bba-0508-ec785327e629" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/AccruedLiabilitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/Capitalization" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/CapitalizationAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/CommitmentsAndContingenciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligation" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligation_19ebda17-c227-6998-e172-9f92c11e82d0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_01f5b313-2678-348d-4bbe-8baf90420c95" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligation_19ebda17-c227-6998-e172-9f92c11e82d0" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_01f5b313-2678-348d-4bbe-8baf90420c95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear_70cfd484-d1cc-7579-5f46-716b16c87ea8" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligation_19ebda17-c227-6998-e172-9f92c11e82d0" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear_70cfd484-d1cc-7579-5f46-716b16c87ea8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear_170eea51-0a3b-fa83-93e2-be59063585f1" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligation_19ebda17-c227-6998-e172-9f92c11e82d0" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear_170eea51-0a3b-fa83-93e2-be59063585f1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear_310cdffd-380c-6bb8-6cce-500616c20209" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligation_19ebda17-c227-6998-e172-9f92c11e82d0" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear_310cdffd-380c-6bb8-6cce-500616c20209" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/CommitmentsAndContingenciesFutureMinimumLeasePaymentsUnderAllOperatingLeasesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_00eaf688-6963-ad8a-03b8-e257d107b9c7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_00eaf688-6963-ad8a-03b8-e257d107b9c7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5519a64c-2a56-b1d5-2ab3-ee16d7d2a7a5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5519a64c-2a56-b1d5-2ab3-ee16d7d2a7a5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_2154b0cd-b6a4-a252-5801-385edf9d9702" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_2154b0cd-b6a4-a252-5801-385edf9d9702" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_c2ad5d03-49c6-819a-1ac6-e6584eea34ff" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_c2ad5d03-49c6-819a-1ac6-e6584eea34ff" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_OperatingLeasesFutureMinimumPaymentsDueinFiveYearsandThereafter" xlink:label="loc_cvlt_OperatingLeasesFutureMinimumPaymentsDueinFiveYearsandThereafter_2b9fd1c8-457a-efdc-017c-448331391e28" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_ab95e8f2-93e0-6140-6e56-a79823c16c0d" xlink:to="loc_cvlt_OperatingLeasesFutureMinimumPaymentsDueinFiveYearsandThereafter_2b9fd1c8-457a-efdc-017c-448331391e28" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ec544f28-9c7b-137c-e428-9ae47c2375fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="loc_us-gaap_ShortTermInvestments_cba84dc8-4958-54c2-1b6f-e02bffbabe75" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_ShortTermInvestments_cba84dc8-4958-54c2-1b6f-e02bffbabe75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_d28874fa-4543-5746-c91a-559d7ab47f77" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_d28874fa-4543-5746-c91a-559d7ab47f77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dbbeeff9-fd43-6151-195d-0532728ac216" xlink:to="loc_us-gaap_OtherAssetsCurrent_fdb77e30-ba68-0e41-abc1-70858b11de5b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_935fce52-c22c-b328-8ef2-ac103d3c71ac" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_935fce52-c22c-b328-8ef2-ac103d3c71ac" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_8186324b-c5f1-8ea6-8e0c-32830db48a5d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_EquityMethodInvestments_8186324b-c5f1-8ea6-8e0c-32830db48a5d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_08bee809-e27e-48c3-da2d-5d52948eb470" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_e6ade192-0839-bdd8-d08b-20387a0e8201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_222239a2-3ddd-5e4f-4ae1-b11c60b29d92" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_AccountsPayableCurrent_222239a2-3ddd-5e4f-4ae1-b11c60b29d92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_567bfdaf-7a71-0a8c-e33e-b9f7b4096843" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_567bfdaf-7a71-0a8c-e33e-b9f7b4096843" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_a859bb84-8118-88ec-5136-83fdb14e8f32" xlink:to="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="loc_us-gaap_DeferredRevenueNoncurrent_1a5a9fc6-9840-2236-a82b-b1165c317cdb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_DeferredRevenueNoncurrent_1a5a9fc6-9840-2236-a82b-b1165c317cdb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_b65887e3-1865-ef3e-c8ae-81780cbff9ee" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_49d65a66-0444-b198-9d28-5c0811b1bdf3" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_CommitmentsAndContingencies_49d65a66-0444-b198-9d28-5c0811b1bdf3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_04e17fb3-9b77-1c98-f460-7f5dd0c01008" xlink:to="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_3c8f3df4-466c-f78c-b021-17337fc4a147" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_PreferredStockValue_3c8f3df4-466c-f78c-b021-17337fc4a147" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_d53388e7-4c8c-4e6d-6e90-7a6e0a100b74" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_CommonStockValue_d53388e7-4c8c-4e6d-6e90-7a6e0a100b74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_b1a68b05-ec26-b896-ce8e-937cca99264e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_b1a68b05-ec26-b896-ce8e-937cca99264e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_f759e73e-9f4f-941e-1138-49bc44f6b118" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_f759e73e-9f4f-941e-1138-49bc44f6b118" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_aeb1020a-508a-a8c1-f34c-bafff16c26cb" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_2644da13-7baa-0a2f-63e0-0906a691ba01" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_aeb1020a-508a-a8c1-f34c-bafff16c26cb" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_b0d6e80b-2a71-4b3d-5167-6e414c6a123b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_b0d6e80b-2a71-4b3d-5167-6e414c6a123b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_ShareBasedCompensation_432488d8-28ca-5b8d-679b-29be120957b5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_0b54a9a6-abc8-9365-0a88-485763fb0af9" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_0b54a9a6-abc8-9365-0a88-485763fb0af9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_91674616-989d-90e8-1302-b52ff7a33098" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_91674616-989d-90e8-1302-b52ff7a33098" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_359134c0-3512-0437-07c4-28574636fc79" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_359134c0-3512-0437-07c4-28574636fc79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ffe19198-61f8-be6a-6111-42f645804604" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ffe19198-61f8-be6a-6111-42f645804604" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d8c0a214-0b0d-1fc8-686b-ed5eca49895f" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_d8c0a214-0b0d-1fc8-686b-ed5eca49895f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_503015f3-ea26-0d7a-c655-6d6aff0c5fab" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_503015f3-ea26-0d7a-c655-6d6aff0c5fab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_ce728eee-c863-e8aa-a864-1d7a3b12d862" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_ce728eee-c863-e8aa-a864-1d7a3b12d862" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_38bb77ff-9a71-da5a-ae9a-8c89f84c6b01" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_38bb77ff-9a71-da5a-ae9a-8c89f84c6b01" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7a016eeb-d472-4272-2fad-97e749a6fbc2" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_975a3fab-7f49-5162-2cb5-31bb1479931f" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7a016eeb-d472-4272-2fad-97e749a6fbc2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_7eefdb79-b488-fe99-9b8e-a51ddf6de5ad" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_7eefdb79-b488-fe99-9b8e-a51ddf6de5ad" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_e1d5c175-5fec-c1e5-c00f-3705673f3dcd" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_e1d5c175-5fec-c1e5-c00f-3705673f3dcd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_e562ae17-71b1-04a7-dfde-c158d13ff0b0" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_e562ae17-71b1-04a7-dfde-c158d13ff0b0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireOtherProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireOtherProductiveAssets_c094319f-e455-d1ac-bba2-987bc5dff7e6" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquireOtherProductiveAssets_c094319f-e455-d1ac-bba2-987bc5dff7e6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_95f67350-d3ec-5d41-e3b2-a4fe7a19e15b" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_991d89e2-25f7-1061-f5f8-86acc91f176b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_fc2ca57d-dc62-7ce6-b2c4-25896bddd1fc" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_fc2ca57d-dc62-7ce6-b2c4-25896bddd1fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_21041b8b-cf55-3af3-04a5-97303c43edf7" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_21041b8b-cf55-3af3-04a5-97303c43edf7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_c1508a6a-babd-3ec7-9349-b4d44aab4c91" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions_c1508a6a-babd-3ec7-9349-b4d44aab4c91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_11b1e641-cd86-3d66-b07d-893757bffb5e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_08614f0c-c3a2-4c92-7c1d-aed5de18fe70" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_11b1e641-cd86-3d66-b07d-893757bffb5e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_9f72449f-62f6-71b1-0128-c7088f4f3527" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_104af714-3829-5d79-3fb3-059f86c366da" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_9f72449f-62f6-71b1-0128-c7088f4f3527" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:to="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_7263cb18-5b58-9955-8575-e8eaa5dac989" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_663a641c-b103-1e10-d3ec-c078ec7a031b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_7263cb18-5b58-9955-8575-e8eaa5dac989" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_1fd2c3b5-12a4-0f06-9816-c6d97d4ac6df" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:to="loc_us-gaap_GrossProfit_1fd2c3b5-12a4-0f06-9816-c6d97d4ac6df" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_1fd2c3b5-12a4-0f06-9816-c6d97d4ac6df" xlink:to="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensesRevenue" xlink:label="loc_us-gaap_LicensesRevenue_b90f446c-aa6e-6f05-c6e4-a42529d65e7d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_us-gaap_LicensesRevenue_b90f446c-aa6e-6f05-c6e4-a42529d65e7d" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_ServicesRevenue" xlink:label="loc_cvlt_ServicesRevenue_f5496c51-bdfb-9569-cab4-44833140791f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_4ce4747e-ba05-83d9-3458-6f9d1635c2ec" xlink:to="loc_cvlt_ServicesRevenue_f5496c51-bdfb-9569-cab4-44833140791f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_5a47dae5-ba55-9292-41d8-64f380f46a8c" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_1fd2c3b5-12a4-0f06-9816-c6d97d4ac6df" xlink:to="loc_us-gaap_CostOfRevenue_5a47dae5-ba55-9292-41d8-64f380f46a8c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicenseCosts" xlink:label="loc_us-gaap_LicenseCosts_23fdfe1b-6e79-c939-df76-6a05b484e6f9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostOfRevenue_5a47dae5-ba55-9292-41d8-64f380f46a8c" xlink:to="loc_us-gaap_LicenseCosts_23fdfe1b-6e79-c939-df76-6a05b484e6f9" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_CostOfServiceRevenue" xlink:label="loc_cvlt_CostOfServiceRevenue_d8a6ffa1-2d6c-9ac8-9b70-448330f193e7" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostOfRevenue_5a47dae5-ba55-9292-41d8-64f380f46a8c" xlink:to="loc_cvlt_CostOfServiceRevenue_d8a6ffa1-2d6c-9ac8-9b70-448330f193e7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_800dbb3e-0416-e0ab-a30e-cfaeb17b8c4c" xlink:to="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_57327f25-a23f-06ed-3328-7fd353dc03f3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_SellingAndMarketingExpense_57327f25-a23f-06ed-3328-7fd353dc03f3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_61ca427c-a8f7-736f-ff6b-927d826fc7fa" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_61ca427c-a8f7-736f-ff6b-927d826fc7fa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_2b63fac5-7a72-3880-3fd2-630099895af7" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_2b63fac5-7a72-3880-3fd2-630099895af7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_35d7e9b2-6ffb-6e68-f590-8605f30d5f8a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_8018a1c5-8b31-881d-1f35-ba7ca791bffa" xlink:to="loc_us-gaap_DepreciationAndAmortization_35d7e9b2-6ffb-6e68-f590-8605f30d5f8a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestAndDebtExpense" xlink:label="loc_us-gaap_InterestAndDebtExpense_ec864808-2c99-68aa-7beb-0607a4ae21dd" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_InterestAndDebtExpense_ec864808-2c99-68aa-7beb-0607a4ae21dd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_ed735562-dfa2-f50c-cfbd-c90d6a562718" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_InvestmentIncomeInterest_ed735562-dfa2-f50c-cfbd-c90d6a562718" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_359134c0-3512-0437-07c4-28574636fc79" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_359134c0-3512-0437-07c4-28574636fc79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_8baf87d5-5f2f-7d0d-cb85-b9f249bae0c5" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/EmployeeBenefitPlan" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/EmployeeBenefitPlanAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesComponentsOfDeferredTaxAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87cdbec2-773d-bc5a-3050-f979513ecb7f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_87cdbec2-773d-bc5a-3050-f979513ecb7f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_82d6f310-2d30-47c4-525e-6e7c40649637" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_82d6f310-2d30-47c4-525e-6e7c40649637" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_f1177a25-1e80-13fd-0827-beddb4de2232" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_f1177a25-1e80-13fd-0827-beddb4de2232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_8cefe667-9d36-bd8e-14f0-d75e8523bc93" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities_8cefe667-9d36-bd8e-14f0-d75e8523bc93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_7de67da8-0b1a-6184-e157-ace61cf2ec38" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_7de67da8-0b1a-6184-e157-ace61cf2ec38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_36eb2c32-e98d-f713-df5d-5d9e7e50b88d" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_dad43eb1-2d05-8e6b-1503-6a61e00404ca" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_36eb2c32-e98d-f713-df5d-5d9e7e50b88d" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_DeferredTaxLiabilitiesDeferredExpenseDepreciationandAmortization" xlink:label="loc_cvlt_DeferredTaxLiabilitiesDeferredExpenseDepreciationandAmortization_ab64dd39-b397-a437-a514-448332489baa" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_01ec1572-4ef3-c4fc-b254-d545dc66e953" xlink:to="loc_cvlt_DeferredTaxLiabilitiesDeferredExpenseDepreciationandAmortization_ab64dd39-b397-a437-a514-448332489baa" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesComponentsOfIncomeBeforeIncomeTaxesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_1681e6de-4e66-20b4-2a19-d146b2f65c02" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_1681e6de-4e66-20b4-2a19-d146b2f65c02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_a0805b6e-967d-7844-2bfa-2e63ee48cdb6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5ba85eae-c4c2-72cc-f9e5-b0edc41783e5" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_a0805b6e-967d-7844-2bfa-2e63ee48cdb6" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b8476f99-9bab-21a6-d61d-02a9c0661176" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_b8476f99-9bab-21a6-d61d-02a9c0661176" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3ab57836-244f-310a-5a92-cb6b846a6a17" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3ab57836-244f-310a-5a92-cb6b846a6a17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_4ecf0d1c-66f0-0be9-cfb9-ecdef8184a9e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_4ecf0d1c-66f0-0be9-cfb9-ecdef8184a9e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_f316d4eb-12c7-f1d0-fd3d-ba8b892345ca" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_f316d4eb-12c7-f1d0-fd3d-ba8b892345ca" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_88730b7a-f2f4-51cb-d8a1-7a903025ce13" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_88730b7a-f2f4-51cb-d8a1-7a903025ce13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_79489ccf-36b3-815d-b6db-f2a6ac50099c" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_9b166675-b7b2-1067-1806-03b1ee0126f1" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_79489ccf-36b3-815d-b6db-f2a6ac50099c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesReconciliationOfAmountsOfUnrecognizedTaxBenefitsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesReconciliationOfStatutoryTaxRatesAndEffectiveTaxRatesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8e6be169-09a9-5661-71bb-cb6bce1f56f7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8e6be169-09a9-5661-71bb-cb6bce1f56f7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_a476c969-d3fd-cf02-0d56-ac5fad2f8a34" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_a476c969-d3fd-cf02-0d56-ac5fad2f8a34" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_EffectiveIncomeTaxReconciliationImpactofLimitonExecutiveCompensation" xlink:label="loc_cvlt_EffectiveIncomeTaxReconciliationImpactofLimitonExecutiveCompensation_1663e5ef-9514-df24-075c-44833106fe5e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_cvlt_EffectiveIncomeTaxReconciliationImpactofLimitonExecutiveCompensation_1663e5ef-9514-df24-075c-44833106fe5e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_592bc0e7-9233-a559-98bd-046511cfe2a6" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_592bc0e7-9233-a559-98bd-046511cfe2a6" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_EffectiveIncomeTaxRateReconciliationPermanentDifferences" xlink:label="loc_cvlt_EffectiveIncomeTaxRateReconciliationPermanentDifferences_f7396ec8-8be3-e614-5fbd-4483311fa17c" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_cvlt_EffectiveIncomeTaxRateReconciliationPermanentDifferences_f7396ec8-8be3-e614-5fbd-4483311fa17c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign_90a66e1c-a6cc-4204-e359-1df13e0f935b" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsForeign_90a66e1c-a6cc-4204-e359-1df13e0f935b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_9c9b74e9-df78-b9b1-d558-1a4e6467fc4a" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_9c9b74e9-df78-b9b1-d558-1a4e6467fc4a" xlink:type="arc" />
    <link:loc xlink:href="cvlt-20170331.xsd#cvlt_EffectiveIncomeTaxRateReconciliationTaxReserves" xlink:label="loc_cvlt_EffectiveIncomeTaxRateReconciliationTaxReserves_5abf3819-d4ed-900f-8b67-448331120868" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_cvlt_EffectiveIncomeTaxRateReconciliationTaxReserves_5abf3819-d4ed-900f-8b67-448331120868" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_cf7d450d-2365-800c-0e12-31ac27cc146f" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_cf7d450d-2365-800c-0e12-31ac27cc146f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_50c81e95-adf2-3649-3640-5d507c220b09" xlink:type="locator" />
    <link:calculationArc order="10" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_50c81e95-adf2-3649-3640-5d507c220b09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_260b0554-5407-84a9-0ddc-c064bbfac41b" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_9d686b75-f9ca-45e9-dcb7-a314128deba9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_260b0554-5407-84a9-0ddc-c064bbfac41b" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesScheduleOfTaxYearsSubjectToIncomeTaxExaminationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/NatureOfBusiness" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/PropertyAndEquipment" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/PropertyAndEquipmentAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/PropertyAndEquipmentDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_8c99d26c-e257-b8ba-86ee-4f792a9452ce" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_95ebcb07-1c4a-1ded-365f-edc9cd2fa101" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_68e7c3c1-9b8d-84fe-3a5c-d69c15dfe7a2" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_95ebcb07-1c4a-1ded-365f-edc9cd2fa101" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/PropertyAndEquipmentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/RevolvingCreditFacility" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/RevolvingCreditFacilityAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/ScheduleIiValuationAndQualifyingAccountsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SegmentInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SegmentInformationAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SegmentInformationScheduleOfLongLivedAssetsByGeographicAreaDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SegmentInformationScheduleOfRevenueByGeographicAreaDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SegmentInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnauditedDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlans" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansActivityForCompanysTwoStockIncentivePlansDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansAssumptionsUsedInBlackScholesOptionPricingModelDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansEmployeeStockPurchasePlanDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansPerformanceBasedAndMarketBasedAwardsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansRestrictedStockUnitActivityDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansStockBasedCompensationExpenseDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansSummaryOfStockOptionsOutstandingUnderPlanAndLtipDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/StockPlansTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesComputationOfBasicAndDilutedNetIncomePerCommonShareDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_ae404dc0-76bc-cd1d-811f-e233c07e0569" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_e841a58a-f12e-0adc-36de-0299a43719a9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_ae404dc0-76bc-cd1d-811f-e233c07e0569" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_e841a58a-f12e-0adc-36de-0299a43719a9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_9dba38ce-5067-b4c4-09f7-0cf74e4693de" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_ae404dc0-76bc-cd1d-811f-e233c07e0569" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_9dba38ce-5067-b4c4-09f7-0cf74e4693de" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesDeferredRevenueDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenue" xlink:label="loc_us-gaap_DeferredRevenue_0a0106fd-a196-7916-5adf-10dea44e4d50" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:label="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredRevenue_0a0106fd-a196-7916-5adf-10dea44e4d50" xlink:to="loc_us-gaap_DeferredRevenueCurrent_2e84b53d-95cb-56a2-a5b5-1d31836c02d9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:label="loc_us-gaap_DeferredRevenueNoncurrent_1a5a9fc6-9840-2236-a82b-b1165c317cdb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredRevenue_0a0106fd-a196-7916-5adf-10dea44e4d50" xlink:to="loc_us-gaap_DeferredRevenueNoncurrent_1a5a9fc6-9840-2236-a82b-b1165c317cdb" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesRecentlyIssuedAccountingStandardsAsu201409IiDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfFairValueOfFinancialAssetsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfPotentialOutstandingCommonStockEquivalentsDetail" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.commvault.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
</link:linkbase>
