Stop guessing which variant “probably won.” This free A/B test calculator uses a standard chi-square test to tell you whether the difference in conversion rates is statistically significant — even for multivariate tests.
The number of visitors
on this page was:
on this page was:
The number of overall
conversions was:
conversions was:
Conversion
rate
rate
9%
10%
Your test results
Test “B” converted 0% better than Test “A”.
I am 0% certain that the changes in Test “B” will improve your conversion rate.
Unfortunately, your results are not statistically significant yet.
Great news! Your results are statistically significant.
This calculator uses a one-tailed two-proportion z-test.