Sample size, statistical significance, test duration, and power calculators.
Most used tools
Determine the optimal duration for your A/B experiments.
Calculate required sample size per variant for reliable test results.
Check whether your test results are statistically valid.
Determine the Bayesian probability of each variant being the winner.
Find the minimum effect your test can detect at your desired confidence.
Set up split tests with optimal traffic allocation.
15 tools available
Determine the optimal duration for your A/B experiments.
Calculate required sample size per variant for reliable test results.
Check whether your test results are statistically valid.
Compare variant conversion rates with statistical precision.
Plan multi-variant tests with proper sample sizing.
Determine the power of your current test setup.
Measure the magnitude of difference between variants.
Determine the Bayesian probability of each variant being the winner.
Estimate the full cost of your A/B testing program.
Find the minimum effect your test can detect at your desired confidence.
Set up split tests with optimal traffic allocation.
Determine confidence level from your observed test results.
Identify your test winner and calculate projected revenue impact.
Determine early stopping boundaries for your A/B test.
Get a quick estimate of test duration in days or weeks.
Our a/b testing calculators provide accurate, instant results for SEO and marketing calculations. Whether you need to track campaign performance, calculate ROI, or optimize your marketing budget, these tools have you covered.
