Free CRO & A/B Testing
Calculators
Every tool you need to plan, run, and analyse A/B tests. Accurate formulas, instant results, no sign-up required.
A/B Test Significance Calculator
Find out if your test results are statistically significant. Enter your visitor and conversion counts to get the p-value, confidence level, and a clear winner verdict.
Open toolSample Size Calculator
Calculate exactly how many visitors you need per variant before starting a test. Set your baseline conversion rate and minimum detectable effect.
Open toolConversion Rate Calculator
Convert raw visitors and conversions into a precise conversion rate with 95% confidence intervals and industry benchmark comparisons.
Open toolA/B Test Duration Calculator
Estimate how many days you need to run your test to reach statistical power. Avoid peeking — know the end date before you start.
Open toolRevenue Uplift Calculator
See the real monetary value of a conversion rate improvement. Calculate monthly and annual revenue lift from a winning A/B test.
Open tool
Stop guessing.
Start testing.
Your first experiment — A/B test, popup, form, or heatmap — can be live in under 2 minutes. No developers, no contracts, no risk.