A/B Test Sample Size/Duration Calculator
Plan your A/B tests with confidence!
How many users will see the experiment every day?
The expected (conversion, sign-up…) rate for your control group.
The smallest improvement you want to detect. Detecting smaller changes requires more data.
Duration
50
days to complete
Sample size
24,601
per variant
The experiment will need to run for 4 months and 9 days to detect a 10% improvement (from 3.0% to 3.3%).
Sample Size Per Variant
Detectable Δ (%) | From → To | Duration | Visitors/variant |
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Days | Visitors/variant | Detectable Δ | From → To |
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