👑 EXCLUSIVE TOOL

A/B Test Designer & Calculator

Build hypotheses, calculate sample sizes, estimate duration, analyze results with p-values and Bayesian probability.

💡 Hypothesis Builder

If we change...

Then this metric...

Will...

By at least...

Baseline Conversion Rate (%)

Minimum Detectable Effect (%)

Confidence Level: 95%

Statistical Power: 80%

Daily Traffic (visitors)

% of Traffic in Test

Variant A Visitors

Variant A Conversions

Variant B Visitors

Variant B Conversions

Fill in the sections above, then click "Generate" to create your test plan.