🧪A/B Testing & Experiments

Statistical significance, sample size & lift calculators.

Run a two-proportion z-test on your A/B test results. Free A/B testing calculator with significance and lift.

Test if your A/B test result is statistically significant. Free significance calculator with p-value and confidence.

Compare two or more variants in a split test. Free online split test calculator with significance and lift.

Calculate percentage lift between control and variant conversion rates. Free conversion lift calculator.

Run a Bayesian A/B test with credible intervals and probability variant beats control. Free Bayesian A/B calculator.