How does the A B Test Significance Calculator work?

Define null hypothesis and significance level (typically 0.05) Then: Calculate sample size needed for power Then: Run A/B test long enough Then: Calculate p-value using chi-square or t-test.

Can you give an example of how to use the A B Test Significance Calculator?

Example: Input A 10%, B 12% gives a result of 95% confidence.

Is the A B Test Significance Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the A B Test Significance Calculator?

Our A B Test Significance Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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A B Test Significance Calculator

A/B Test Significance

Control Conversions

Control Sample Size

Test Conversions

Test Sample Size

Determines if A/B test results are statistically significant or due to chance. Critical for making confident product and marketing decisions.

Difficulty:advanced

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Did You Know?

Testing one variant per week compounds improvements: 1% weekly = 37× improvement annually.

References

›A/B Testing Guide

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A B Test Significance Calculator

A/B Test Significance

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A/B Test Significance