A/B Test Sample Size Calculator
Estimate the traffic needed to detect a conversion lift.
01 / INPUTS
Plan before launch.
Choose a lift worth detecting, then enter eligible daily traffic. Example values are loaded.
02 / RESULT
The traffic you need.
Showing an example scenario.
Approximate sample per variant for a two-sided 95% confidence z-test. This is planning guidance, not a result analysis.
How to use it
- Enter your baseline conversion
- Choose the lift you need to detect
- Add daily traffic to estimate run time