Free business calculator
Conversion Rate Confidence Range Calculator
Turn one conversion rate into a fair range that shows sample uncertainty.
- Instant results
- Private in your browser
- PDF report included
Use the result well
A clear answer, with the assumptions visible
These recommendations turn the result into an operational next step without hiding the inputs behind a score.
- 1
Keep the visitor and conversion definitions fixed.
- 2
Compare similar traffic periods before acting on a small change.
- 3
Collect more observations when the range is too wide for the decision.
How this tool works
- Divide conversions by valid visitors.
- Use jStat’s normal distribution for the selected confidence level.
- Build a Wilson score range that stays between 0% and 100%.
Build it in Bookify
Create a booking page Give the next visitor a clear step
Connect your campaign and booking page in Bookify.