SAMPLE SIZE CALCULATOR

Calculate the necessary sample size reach 95% confidence for your A/B Test

Sample Size per Recipe Response Rate per Recipe
Control
Test Group
Difference Index

Proportions Calculator

The go-to A/B Test calculator, if you know your KPI conversion rate and sample size, you have everything you need.

Z Score to Confidence Calculator

If you have your standardized z-score, this calculator will help you convert that to a confidence level for either one-sided or two-sided tests.

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Evan VermilyeaCalculator – Sample Size