Bayesian A/B Test Calculator

Quantify decision risk and success probability through Bayesian inference and Monte Carlo simulations.

Enter data manually or import it from Google Sheets, then click Calculate.

Variants

Name
Visitors
Conversions
Name
Visitors
Conversions
Duration
Import

Required columns: Variant, Visitors, Conversions · Optional: Start_Date, End_Date.

Statistical engine: Empirical Prior · Expected Loss vs ROPE · 95% HDI · 100K MC simulations · Adaptive stopping