SAMPLE SIZE CALCULATOR

Calculate the sample sizes for your experiments

Sample Size Calculator

Calculate how many samples you need to properly power your experiment
30%
50%
70%
Minimum Detectable Effect
Test vs. Control
Range can be 0.01-0.1
Range can be 0.65-0.95
TEST SIZE

198

CONTROL SIZE

198

TOTAL SAMPLE SIZE

396

Setting up a proper A/B experiment involves selecting the appropriate sample size. This ensures the test is adequately powered to detect the change while minimizing statistical noise. In statistical terms, we want to detect the minimum detectable effect (MDE) with statistical confidence.

* Having too few samples produces statistically ambiguous results, and having too many samples can be overkill and a waste of time and resources

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