A/B Testing Cloud Cost Calculator
Estimate the cloud infrastructure, event processing, and test-data storage costs of running an A/B test.
Overview
This A/B testing cloud cost calculator estimates the extra cost of running an experiment by combining test traffic, additional analytics events, variant infrastructure, and data storage. Use your own provider pricing to create a practical test budget before launching.
How it works
The calculator first estimates total test participants by multiplying daily visitors by test duration. It then calculates additional analytics events and their processing cost. Infrastructure cost is based on the monthly cost per variant, number of variants, and test length. Storage cost reflects the total data generated and the fact that data created throughout a test is stored for an average of roughly half the test duration. These components are added to estimate total cloud cost.
How to use this calculator
- 1Enter the average number of visitors expected to participate each day.
- 2Set the planned duration of the experiment in days.
- 3Enter the total number of variants, including the control.
- 4Add the extra events tracked for each participant and your event processing rate.
- 5Enter estimated infrastructure and storage costs, then review the total estimate.
Example Calculation
Daily test visitors
10000
Test duration
21
Number of variants
2
Additional tracked events per visitor
4
Event processing cost per 1,000 events
$0
Monthly infrastructure cost per variant
$60
Daily test data generated
1.5
Storage cost per GB-month
$0
Estimated total cloud cost
$101.02
For 10,000 daily visitors over 21 days, the estimated total cloud cost is about $101.02. Most of the cost in this example comes from the two variant environments.
Frequently asked questions
What costs does this A/B testing cloud cost calculator include?
It estimates extra event processing, infrastructure allocated to variants, and storage for experiment data. It does not automatically include every possible cloud charge.
Does running more A/B test variants always increase cloud cost?
It can increase cost when each variant needs separate infrastructure or resources. Analytics event costs may depend more on total traffic and events than on the number of variants.
Why are additional tracked events important for cost estimates?
Experiments often add exposure, assignment, conversion, diagnostic, and segmentation events. At high traffic volumes, those events can create measurable analytics or logging charges.
Does the calculator include data transfer or egress fees?
No. Add expected egress, API, database, monitoring, or vendor platform fees separately if they are significant for your setup.
Why is storage calculated using half the test duration on average?
Data is generated gradually rather than all on the first day. On average, a unit of data generated during the test is stored for about half of the test period.
Can I use this calculator for feature flag experiments?
Yes. Enter the incremental event, infrastructure, and data-storage costs associated with your feature flag or experimentation setup.
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Assumptions and warnings
Assumptions
- Costs are estimates based on the rates and usage values you enter.
- All variants are assumed to require the same monthly infrastructure cost.
- Additional tracked events are assumed to be generated consistently for every test participant.
- Test data is assumed to be retained for the duration of the experiment, with data accumulating evenly over time.
- The calculation uses a 30-day month for monthly infrastructure and storage estimates.
Warnings
- This calculator provides a planning estimate only and is not financial advice.
- Actual cloud charges can differ because of minimum fees, free tiers, regional pricing, data egress, taxes, and usage spikes.