Margin BenchProduct index / business

Marketing returns

Visitor Conversion Rate Calculator

Measure the percentage of eligible visitors who complete one defined conversion during the selected window.

Use this for visitor-to-converter success, with each visitor counted at most once. Use CTR for impression-to-click performance.

Your inputs

Use consistent units and a matching period throughout. Enter decimals with a dot or comma, without thousands separators.

Distinct visitors exposed to the opportunity to convert, measured within the same window; must be greater than zero.

Distinct eligible visitors who completed the defined action; cannot exceed eligible visitors.

Your result

Result for the default inputs

Visitor conversion rate

3%

Calculations run in this browser. Inputs are not sent to a server or added to a share link.

What the result means

The rate is the share of eligible visitors who converted at least once. Changes can reflect traffic quality as well as page performance; this calculation alone does not establish a causal improvement.

The formula

(Converted visitors / eligible visitors) * 100

Results are displayed to at most two decimal places. Calculations use the unrounded inputs.

A worked example

Put the formula to work

Eligible visitors (visitors)
4,000
Converted visitors (visitors)
120

Visitor conversion rate: 3%

If 120 of 4,000 distinct visitors convert, the visitor conversion rate is 3%.

How to use this calculator

  1. Define one conversion action and its observation window.
  2. Count distinct eligible visitors and deduplicate those who converted.
  3. Check that converters belong to the eligible population.
  4. Divide converters by visitors and multiply by 100.

Why this number matters

A clear visitor denominator prevents repeated purchase events from inflating the apparent share of people who convert.

Input definitions

Eligible visitors (visitors)
Distinct visitors exposed to the opportunity to convert, measured within the same window; must be greater than zero.
Converted visitors (visitors)
Distinct eligible visitors who completed the defined action; cannot exceed eligible visitors.

Assumptions and limitations

  • This is a unique-visitor rate, not conversions per session or event frequency.
  • Cross-device identity, consent loss, and tracking gaps affect both counts.
  • Small samples require uncertainty analysis before interpreting differences.

Methodology

The default result and worked example use the same calculation functions as the interactive tool. The formula cannot verify the quality or scope of your source data.

Read our calculation methodology

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