These tools are free for all during our launch period.
Subscribe to keep access when we go subscriber-only.
Calculator Suite
Choose a calculator to get started. All computations run locally in your browser.
Sample Size Calculator
Determine the required sample size for your A/B test. Start with your desired uplift and get instant answers.
SRM Checker
Detect sample ratio mismatch issues in your experiment. Paste your data and get instant diagnostics.
Conversion Lift Calculator
Quantify the uplift between two variants and determine if the difference is statistically significant.
Duration Estimator
Estimate how long your experiment needs to run based on your traffic and desired sensitivity.
Annualized Impact
Project your experiment results to annual business impact with decay and seasonality adjustments.
These tools are built with care, but we can't guarantee accuracy for every scenario. If something seems off, please reach out at [email protected] — we'd love to hear from you. We hope these tools help you run better experiments!