Advanced A/B Testing Calculator & Statistical Analysis Platform

Welcome to ProABTest, the most comprehensive free platform for professional-grade statistical analysis in A/B testing. Our suite of 14+ specialized tools empowers data scientists, product managers, and CRO specialists to make confident, statistically sound decisions that drive real growth.

Key Statistical Tools

• Sample Size Calculator: Frequentist and Bayesian methods for accurate power analysis.
• Significance Test: Rigorous p-value and probability analysis for experiment results.
• Power Analysis: Deep dive into your test's ability to detect meaningful effects.
• Sequential Testing: Methods to monitor tests safely without increasing false positives.
• Monte Carlo Simulations: Virtual user simulators to predict experiment outcomes.
• Multi-Armed Bandits: Bayesian bandit simulators for dynamic traffic allocation.
• Chi-Squared & Poisson Tests: Specialized tests for different data distributions.

Why Trust ProABTest?

Unlike basic calculators, ProABTest uses industry-standard statistical rigor, incorporating both Frequentist and Bayesian frameworks. Our tools are designed with "Privacy by Design," performing all calculations locally in your browser. No sensitive experiment data ever leaves your machine.

Learning Resources & Compliance

Beyond tools, we provide an extensive Learning Center with 20+ in-depth articles on experiment design, common pitfalls, and advanced methodology. Explore our comprehensive guides to master the science of growth.