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🧪 A/B Test Calculator
Conversions of two groups → lift · significance p-value · confidence interval · required sample size and days
Analysis Mode
Experiment data (conversions / sample size)
Notes
· Significance test: two-proportion z-test (pooled proportion), two-sided p-value; significance threshold = selected α. Conversion lift = (pB − pA) / pA.
· Sample size planning: equal split, two-sided test; n = sample size needed per group; days = ceil(n / daily traffic per group).
About A/B Test Calculator
Calculate A/B test sample size from baseline conversion and MDE, then test significance with p-value and confidence intervals for experiment decisions.
Learn more about this tool →
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