Free A/B Test Calculator
Plan and validate your A/B tests with confidence. Calculate sample sizes, test durations, and minimum detectable effects - all in one place.
Minimum Detectable Effect Calculator
Calculate the smallest improvement you can reliably detect with your current traffic
Complete A/B Testing Guide
Learn everything you need to know about running successful A/B tests
What is A/B Testing?
A/B testing is a scientific method for comparing two versions of a webpage or app feature.
By showing different versions to different users and measuring their behavior, you can make
data-driven decisions about which changes improve your conversion rates.
When to Use A/B Testing
Use A/B testing when you want to:
• Optimize conversion rates
• Improve user experience
• Test new features
• Validate design changes
• Measure the impact of pricing changes
Why Use Our A/B Test Calculator?
Accurate Results
Built on proven statistical methods to ensure reliable test planning
Easy to Use
Simple interface that guides you through the process
Free Forever
No sign-up required, completely free to use
Frequently Asked Questions About A/B Testing
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