Free Statistical Tools

A/B Test Calculators for Data-Driven Decisions

Calculate statistical significance, determine sample sizes, and analyze your A/B tests with confidence. Professional-grade tools that are completely free to use.

Choose Your Calculator

A/B Test Calculator
Calculate statistical significance for your A/B tests with confidence intervals
Sample Size Calculator
Determine the required sample size for your experiments before you start
Chi-Square Test
Analyze categorical data and test independence between variables

Why Choose Our Calculators?

Statistically Accurate

Built with proper statistical methods and validated formulas for reliable results.

Fast & Easy

Get instant results with our user-friendly interface. No complex setup required.

Privacy Focused

All calculations happen in your browser. Your data never leaves your device.