Free A/B Testing Tools

Free tools for experimentation and product teams:

• A/B Test Duration Calculator - Calculate sample size and time-to-signal for A/B tests
• Low-Traffic A/B Testing Calculator - Should you run this test at all? A decision gate for low-traffic experiments.
• MDE Calculator - What's the smallest effect you can detect with your traffic?
• AB Test Significance Calculator - Check if your observed uplift is statistically significant.
• Low-Traffic Decision Calculator - Should you ship Variant B? Get a clear recommendation for low-traffic experiments.
• Experiment Preflight Check - Will your experiment reach significance? Evaluate feasibility before you launch.