A/B testing

Statistical power calculator

Estimate the minimum detectable effect (MDE) size based on a given sample size and power level. Perform a power analysis of an A/B test plan.

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Advanced power analysis calculator

Power analysis and MDE calculation done right!

  • Works with binomial metrics such as conversion rates
  • Power analysis for tests with multiple variants (A/B/N tests)
  • Supports non-inferiority test designs
  • Examine the full power function instead of just a single point
  • Excellent documentation and presentation of calculation results
A/B testing tools

Take your A/B testing to the next level

Experience the power and utility of our A/B testing hub and all tools during our 14-day free trial. No credit card required.

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See what our clients have to say

A tool with real value if you know how to use it. Might seem intimidating at the beginning, but it tries to provide flexibility, accuracy and optimization in your statistical analysis instead of over-simplification.

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Arnau Vendrell
Co-Founder, iSocialWeb Marketing

At Cro Metrics, we've run tens of thousands of experiments for leading brands. Analytics Toolkit and the AGILE test calculator represent a step above and beyond every one of the other tools we've used.

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Ryan Lucht
Director of Strategy, Cro Metrics