Conversion Rate Calculator
Calculate conversion rate with a 95% confidence interval, revenue per visitor and the conversions needed to hit a target rate.
Last reviewed by the Radiatus Cloud team
Conversion rate = conversions ÷ visitors × 100. E-commerce sites typically convert at 1–3%; landing pages 5–15%; SaaS free-trial sign-up 2–5%. The 95% confidence interval shows the uncertainty from your sample size.
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Calculate conversion rate properly
Conversion rate is the percentage of visitors who take an action, and a raw rate without a confidence interval can mislead. This calculator computes conversion rate with a 95% confidence interval and revenue per visitor, so you know how reliable the number is.
Why a confidence interval matters
A conversion rate measured from a sample is an estimate, and a rate of 5% from 20 visitors is far less certain than 5% from 20,000. The confidence interval quantifies that uncertainty, giving the range the true rate likely falls in, so you do not over-react to a rate that is really just noise from a small sample. Ignoring this is a classic mistake, declaring a change an improvement on a handful of conversions. Reporting the interval alongside the rate is what turns a number into a trustworthy measurement, and revenue per visitor connects it to money.
A planning estimate
It runs entirely in your browser, so nothing you enter is uploaded, which matters when the input concerns your own business or security posture.
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Frequently Asked Questions
What is a conversion rate?
The percentage of visitors who take a desired action, such as buying or signing up. It measures how effectively traffic turns into results.
Why include a confidence interval?
Because a rate from a small sample is uncertain. The interval gives the range the true rate likely falls in, so you do not over-react to noise.
Why is a rate from few visitors unreliable?
Because a handful of conversions can swing the percentage widely. 5% from 20 visitors is far less certain than 5% from 20,000, which the interval captures.
What is revenue per visitor?
The average revenue each visitor generates, connecting the conversion rate to money, which is often more decisive than the rate alone.
Is my data uploaded?
No. The calculation runs entirely in your browser.
Privacy & Security
Runs entirely in your browser. No data is sent to any server.
How to Use
Enter conversions and visitors. Optionally add revenue and a target rate to see RPV, AOV and the gap to your goal.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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BusinessEstimate what a data breach would cost from records exposed, cost per record, days to detect and hours of downtime, split into direct and indirect costs.