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.
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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.