CTA Variant Tester
Enter impressions and conversions for each variant to compare conversion rates and the observed difference.
A QUICK WALKTHROUGH
How to use this tool
- Enter impressions and conversions for variant A.
- Enter the matching counts for variant B.
- Review each conversion rate, percentage-point difference, and relative change.
Manual sample comparison
This tool summarizes the counts you enter. It does not collect visitors, assign traffic, randomize variants, or claim that a difference is statistically significant.
Valid counts
Impressions must be positive whole counts and conversions must be whole counts from zero through impressions. Results are shown as observed rates.
GOOD TO KNOW
Common questions
Does it run an experiment?
No. Enter your own summary counts; the page does not send traffic or collect analytics.
Does a higher rate prove a winner?
No. It reports the observed difference only and does not make significance or causality claims.
What is a percentage-point difference?
It is the direct subtraction of the two conversion rates, expressed in percentage points.