Thumbnail A/B Test Calculator
Compare click-through rates with statistical significance testing.
CTR (A)
5%
Inputs
Comparison
CTR (B)
6.2%
Lift (B vs A)
24%
Z-Score
3.69
Significant at 95% (1=Yes)
1
Min Sample Each
2,878
Results Overview
How to Use This Calculator
- Enter the total impressions and click-through rate (CTR) for Thumbnail A.
- Input the same metrics for Thumbnail B.
- Set the statistical confidence threshold (95% is standard).
- Review the Winner and Statistical Significance level of the result.
- Use the Uplift in CTR output to project how much additional traffic the winning thumbnail will generate.
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