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Sample Size Calculator

Determine the minimum number of users for your experiments.

95 %

Your calculation result will show up here.

Your sample size should be:

What is sample size?

The same size calculator calculates what sample size per variant you'll need to measure the desired change in your conversion rate for your A/B test. The calculator uses the baseline conversion rate for your control group, the minimum relative change in conversion rate you would like to be able to detect (MDE), and a significance threshold (95% by default).

By using this calculator before your A/B tests, you'll be able to estimate the duration of your A/B test according to how many vistors you get on a daily basis.

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