Conversion Rate Calculator: Conversions as a Share of Visitors
Work out a conversion rate from conversions and total visitors — the core metric for a landing page, an ad, or a checkout funnel.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Percentage | Remaining percentage |
|---|---|---|
| 80 of 2,000 | 4.00% | 96.00% |
| 150 of 5,000 | 3.00% | 97.00% |
| 12 of 600 | 2.00% | 98.00% |
| 340 of 4,250 | 8.00% | 92.00% |
How This Calculator Works
Enter the number of conversions and the total number of visitors or sessions. The calculator divides one by the other and multiplies by 100 to give the conversion rate, then shows the complement — the share of visitors who did not convert.
The Formula
Part as a Percentage of a Whole
Part is the portion, Whole is the total it belongs to
Worked Example
A page with 80 conversions from 2,000 visitors has a conversion rate of 4%. The complement is 96%, the share of visitors who left without converting — the audience an optimization effort is trying to win.
Key Insight
A small conversion-rate gain is worth more than it looks. Lifting a rate from 4% to 5% is only one percentage point, but it is a 25% increase in conversions from the very same traffic.
Frequently Asked Questions
How is conversion rate calculated?
Divide the number of conversions by the total visitors or sessions, then multiply by 100. Eighty conversions from 2,000 visitors is a 4% rate.
What counts as a conversion?
Whatever action you define — a purchase, a sign-up, a download, a lead form. Be consistent about which action and which visitors you count.
Should I use visitors or sessions?
Either, as long as it is consistent. Sessions count repeat visits separately; unique visitors do not. The denominator changes the rate, so pick one and keep to it.
What is a good conversion rate?
It varies enormously by industry, traffic source, and goal. Compare against your own past performance and similar pages rather than a universal benchmark.
Why does a small rate change matter?
Conversion rate is relative to fixed traffic. Moving from 4% to 5% is a 25% lift in conversions without spending anything more on attracting visitors.
Related Calculators
Methodology & Review
The conversion rate is conversions divided by total visitors, multiplied by 100. The complement is the share that did not convert. A conversion is whatever action you define it to be.
Written by Ugo Candido · Last updated May 17, 2026.