Calculator Assumptions - Amazon AWS

The AWS Pricing Calculator is an estimation tool that provides an approximate cost of using AWS services based on the usage parameters that you specify. Pricingassumptions&variations GeneralAssumptions&Variations TheAWSPricingCalculatorisanestimationtoolthatprovidesanapproximatecostofusingAWSservicesbasedontheusageparametersthatyouspecify.TheAWSPricingCalculatorisnotaquotetool,anddoesnotguaranteethecostforyouractualuseofAWSservices.ThecostestimatedbytheAWSPricingCalculatormayvaryfromyouractualcostsforanumberofreasons.Commonreasonstheestimatemaybedifferentfromyouractualcostinclude: Actualusage.Youractualcostwillbebasedonyouractualuseoftheservices,nottheCalculator.TheaccuracyofyourinputsintotheCalculatoraffectstheaccuracyofyouractualcosts.Forexample, IfyouestimateyouwilluseacertainnumberofEC2instances,butyouactuallyusemore,youwillbebilledforyouractualutilization. IfyouuseAWSservicesthatyoudidnotincludeinyourestimate,thenyourestimatewilldifferfromyouractualbill. Ifyouover-orunder-estimateDataTransferinputsoroutputsforAWSservices,youractualbillmayvary. Ifyouestimateyourserviceusebasedonpurchasinga3-yearreservationforaservice,butyoubuya1-yearreservation,yourmonthlyandupfrontpriceswillvaryfromtheestimate. Regionused.ThepricesforAWSservicesvarybetweenRegions.UsingdifferentRegionthantheoneusedintheCalculatorwillaffecttheaccuracyoftheresults. Changeinprices.AWSofferspay-as-you-gopricingformostservicesandpricesmaychangeovertime.IfyoubuyservicesOnDemand,yourbillmaybelessormorethanestimated,basedonthecurrentOnDemandservicerates.Forcertainservices,youmaybuya1or3yearreservationtolockinthepriceasofthedateofyourreservation. Taxes.TheCalculatordoesnotincludeanytaxesthatmaybeappliedtoyourpurchaseoftheservices. Timeframeassumptions.TheCalculatorassumes730hoursinamonth,(365daysinayearx24hoursinaday/12monthsinyear).Theestimated,firsttwelvemonth’stotaliscalculatedby((12xmonthlytotalcost)+upfronttotalcosts).TheCalculatordoesnotaccountforleapyears,whichaddsoneday. 12-monthtotals.TheCalculatoronlyshowsyourestimatedtotalsuptothefirst12monthsofutilization.Ifyouestimatecostswitha3year,partialupfrontpricingstrategy,youwillonlyseeestimatedcostsadjustedforthefirst12monthsofthe3yearreservation. Freetier,promotionalcreditsanddiscounts.TheCalculatordoesnotaccountforfreetierpricing,promotionalcredits,orotherdiscounts.Youmaybeeligibleforadditionaldiscountsthatarenotcapturedintheestimate.Contactsalesformoreinformation. Monthlybillingperiod.AWSbillsonamonthlybasis.Ifyourutilizationstartsmid-month,youwillonlyseeaportionofanactualmonth’scompletecosts. Rounding.TheCalculatorperformsmathematicalroundingofpricingdata.FordetailsonhowtheCalculatorrounds,refertothepricingmathcontainedinthe“Showcalculation”sectionofeachserviceconfiguration. Tieredpricing.YoumayqualifyforvolumediscountsbasedonyourcurrentuseofAWSservices,outsideofwhatyouestimateintheAWSPricingCalculator.TheCalculatordoesnotaccountforusagethatyoudonotincludeintheestimate. Forexample,ifyoualreadyuse500TBpermonthofAmazonS3Standardstorage,youpay$0.022perGB.IfyouusetheCalculatortoestimateanadditional50TBpermonth,theCalculatorwillassumethisisthefirst50TBpermonthwhichiscostedhigherat$0.023perGB.Yourcumulativeactualspendon550TBpermonthonAmazonS3wouldbelessthantheestimatedadditionalcosttoyourcurrentspend. Persecondbilling.SomeAWSservicesusepersecondbilling.TheCalculatordoesnotaccountforpersecondbillingoptions. Third-partylicensingfees.TheCalculatordoesnotaccountforthird-partylicensingfees,suchassoftwaresolutionsdeployedfromAWSMarketplace. Currency.TheCalculatorestimatesinU.S.dollars.Globalexchangeratesvaryovertime.Ifyoutranslateyourestimatetoadifferentcurrencybasedonthecurrentexchange,changesintheexchangeratewillaffecttheestimate. AmazonEC2Assumptions&Variations Burstableinstances.Someinstanceshaveadditionalcostswhenitcomestoburstcapacity,(e.g.,T2andT3unlimitedinstances).Youaccrueburstcreditswhenrunningburstableinstances,whichyoucanusetowardyourbill,butifyouexhaustthoseburstcredits,youwouldneedtopayadditionalcostsforthoseoverages.Formoreinformationonburstableinstances,seeAmazonEC2instancetypes. Workloads.Inordertodeliveracost-optimizedpricingstrategy,theCalculatorperformsabreak-evenanalysisforyourspecifiedinstanceandworkload.Theanalysisevaluatesthecostforbothon-demandandreservedinstancescenariosanddeliversarecommendationforeitherpricingmodeloracombinationofthetwoforthemostcost-effectivesolution. Aworkloadisonlyasaccurateasitispredictiveofyouractualworkload.Forexample,ifyouusemorethanyouestimate,youwillbebilledformore.Ifyouuseless,youwillbebilledforless. Thebreak-evenanalysisisbasedupona730hourmonth.Youractualmonthmayhaveadifferentbreak-evenpoint,andeveryinstancehasadifferentbreak-evenpointbasedonitsownOnDemandandReserveInstanceprices. Daily:Thereisanunevendistributionofdaysinamonth.IfyouonlyruninstancesonMonday,wenormalizehowmanyMondaysareinamonth.Theactualmaybe4or5forthecurrentmonth,butweaveragethisto4.3Mondaysinamonth.(Examplemath:730hoursinamonth/(24hoursinaday*7daysinaweek)=4.3452occurrencesofaspecificdayinamonth.) Weekly:TheCalculatorassumesthereare4.34weeksinamonth. Monthly:TheCalculatorassumesthereare730hoursinamonth. Custom:TheCalculatorassumesthatallinstancesdescribedinthecustomworkloadaresimultaneouslyrunning.WhentheCalculatorperformsabreak-evenanalysisforacost-optimizedscenario,itdoesnotknowwhenthevariouscustomworkloadinstancesarerunning,simultaneouslyorserially.Iftheinstancesarenotrunningsimultaneously,itmaybecheapertobuymorereservedinstances.Tolearnmore,contactsales. Spotpricing.WithSpotinstances,youpaytheSpotpricethat'sineffectforthetimeperiodyourinstancesarerunning.TheSpotpricingstrategyassumesahistoricalaveragediscountfortheinstancetypeyouselect,however,historicalvaluesmaynotbepredictiveoftheactualdiscountatthetimeofyourutilization.Youmayadjusttheassumeddiscountasbestfitsyourestimationmodel,however,theassumeddiscountisnotaguaranteeforyouractualcost. Dedicatedinstances.TheQuickestimatetabdoesn'tsupportDedicatedInstances.Ifyouchoosededicatedinstances(intheAdvancedestimate),dedicatedhostfeesmayapplyforyourRegion.Formoreinformation,seeDedicatedhostpricingdocumentation. BYOLlicensing.IfyouchooseWindowsBYOLasyouroperatingsystem,(bringyourownlicense),pleasevisitourdocumentationforfurtherinformation. AmazonElasticBlockStorage(EBS).FortheAmazonElasticBlockStorage(EBS)estimate,thecalculatorassumesthatyourEBSsnapshotsareretainedforonemonth,andthensubsequentlydeleted. AWSBudgets Ifyouareconcernedaboutthesepotentialvariations,consideringusingAWSBudgets.AWSBudgetsgivesyoutheabilitytosetcustombudgetsthatalertyouwhenyourcostsorusageexceed(orareforecastedtoexceed)yourbudgetedamount.Youcouldalsodefineactionsyouwanttotakeinyouraccountwhenabudgetexceedsitsthreshold(actualorforecastedamounts).Learnmore. EndingSupportforInternetExplorer Gotit AWSsupportforInternetExplorerendson07/31/2022.SupportedbrowsersareChrome,Firefox,Edge,andSafari. Learnmore Gotit