Fast calculator flows with instant feedback and cleaner layouts.
Fast calculator flows with instant feedback and cleaner layouts.
Not Significant
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Collect more data
UseDaily's free A/B test significance calculator tells you whether the difference in conversion rates between two variants is statistically significant. Enter visitor counts and conversions for Variant A and B to get a confidence level and a clear recommendation.
Enter the number of visitors and conversions for Variant A and Variant B. The calculator returns a statistical confidence percentage and tells you whether to declare a winner or collect more data.
Evaluate experiment results before shipping a winning variant to production.
Make data-driven decisions about feature changes based on statistical evidence.
Determine which landing page, email subject line, or CTA performs meaningfully better.
Uses Z-score analysis to determine if the conversion rate difference is statistically meaningful.
Returns a clear confidence level (e.g. 95%) rather than raw p-values.
Tells you whether Variant B is a statistically significant winner or if you need more data.
All processing happens in your browser. Your data is never sent to any server.