A/B Test Significance

How Many Participants Do You Need?

Use this tool to predict how many visitors you'll need in order to have a conclusive A/B test.

The results depend on your desired statistical confidence and the impact of your experiment. Learn more.

About Your A/B Test:

Current Conversion Rate:
%
Desired Confidence Level:
Data assumes a Bernoulli Trial experiment with a two-tailed hypothesis test.