A/B test calculator
Calculate the sample size you need or analyze the results of an A/B test.
Test parameters
How to read the parameters
- Baseline CR: your current conversion rate (control)
- MDE: the smallest change you want to detect (e.g. 10% = from 5% to 5.5%)
- Confidence: the probability of avoiding false positives (95% is standard)
- Power: the probability of detecting a real effect (80% is standard)