A/B Test Sample Size Calculator
Determine the required sample size for a statistically significant A/B test.
Experiment Parameters
Enter the details of your planned A/B test.
The current conversion rate of your control (variation A).
The smallest relative improvement you want to be able to detect (e.g., 10% uplift).
The probability that you will not make a false positive error.
Required Sample Size
Based on a standard statistical power of 80%.
15,333
visitors per variation (A and B).