Live tool/tool/ab-test-significance-calculator

A/B Test Significance Calculator

Compare two conversion rates with a quick two-proportion significance estimate and practical lift readout.

AnalyticsMarketingExperimentation

Control visitors

Control conversions

Variant visitors

Variant conversions

Control rate

Variant rate

Lift

0.2%

Confidence

0.9%

Z-score

1.51

Result

Directional

Interpretation

This uses a two-sided two-proportion z-test. Use it for a quick read, not as a substitute for experiment design discipline.