Marketing & Growth
A/B Test Significance Calculator
Runs a standard two-proportion z-test on your test data — the same statistical method behind most A/B testing platforms' significance checks.
FreeNo sign-upRuns in your browser
- Statistically significant (p<0.05)?
- 1
- Relative uplift, B vs A
- +20%
- Variant A rate
- +5.0%
- Variant B rate
- +6.0%
- p-value
- +2.8%
Uses a two-proportion z-test. Treat results near the 5% threshold cautiously, and avoid stopping tests early based on interim significance.
How it works
- 1Enter visitors and conversions for both variants
- 2See the p-value, significance verdict and relative uplift
Who this is for
- Deciding whether to call a completed A/B test
- Double-checking a testing platform's significance claim
- Teaching experimentation fundamentals
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