A/B Test Calculator

A/B testing (split testing) compares two versions of a web page, email, or other element to determine which performs better. Statistical significance testing ensures the observed difference is not due to random chance

The calculator uses the standard published formula for ab test calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Calculate conversion rates for each variant: rate = conversions / visitors. Each step in the calculation is shown so you can verify the result manually.