Campaign landing page
Check whether variant B is meaningfully outperforming the control before you call a winner.
Marketing tools
A/B test significance calculator
Compare two variants using visitors and conversions to estimate uplift, z-score, p-value, and significance.
How to use
- Enter visitors and conversions for variants A and B.
- Choose a confidence level.
- Review conversion rates, uplift, z-score, p-value, and the plain-language summary.
Why this tool is useful
This calculator is designed for quick experiment checks during analysis and reporting.
It uses a two-proportion z-test and reports whether the observed gap is significant at the selected confidence level.
Examples
FAQ
Is this a replacement for a full experimentation platform?
No. It is a fast browser calculator for directional analysis and reporting support.
Related tools
Sample size calculator for conversion tests
Estimate the required sample size per variant from baseline rate, minimum detectable effect, confidence, and power.
Multivariate test calculator
Compare three or more variants by visitors and conversions, review rates, and identify the current leader.