Free A/B Split Test Sample Size Calculator

Baseline Conversion Rate: Your current conversion rate (e.g., the percentage of visitors who make a purchase).
Minimum Detectable Effect: The smallest change in the conversion rate you want to detect.
Statistical Significance: The confidence level you want for your test results (usually 95%).
Statistical Power: The probability of detecting a true effect (typically set at 80%).

This easy-to-use tool helps you find out how many visitors you need to test two different versions of your webpage or app.