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ToolMerit
FREE MARKETING TOOL · NO ACCOUNT OR API
Calculate a rate from your traffic and conversions, or compare a target rate with your baseline. Keep one page, time period, audience, and conversion definition in scope.
Calculations run locally. These calculator inputs are not sent to an API, stored by this tool, or added to the URL. Copying puts the result on your clipboard. General site analytics are described in our privacy policy.
CHECK THE MATH
Conversion rate = converting sessions ÷ total sessions × 100. For a visitor-based rate, use converting unique visitors and total unique visitors instead.
At the same 10,000 sessions, a 3% target implies 300 converting sessions. Additional conversions = traffic × (target rate − current rate) ÷ 100: here, 60.
The rate difference is 0.6 percentage points, not 0.6% relative growth. Relative lift = (target − current) ÷ current × 100: here, 25%. With a zero baseline, relative lift is undefined.
If each incremental conversion is assigned $50, then 60 × $50 = $3,000 of modeled additional value. A negative difference models a decline. Leaving value blank keeps the result in conversions only.
Expected counts may be fractional; displayed values are rounded estimates. The model excludes costs, refunds, traffic changes, attribution, repeat purchases, and uncertainty. It is not a profit forecast or an A/B significance test.
AVOID A MISLEADING RATE
One session with three signup events is still one converting session in a session-based rate. This tool measures the share of sessions or visitors that converted, so that count cannot exceed total traffic. It does not calculate repeat events per visit.
Google defines GA4’s session key event rate as sessions with a key event divided by total sessions. Dividing the raw key-event count by sessions can answer a different question.
Use the same page, date range, conversion action, and audience filters in both counts. Do not divide all-site conversions by one landing page’s traffic. An email signup rate is not directly comparable with a purchase rate.
For a combined rate, add converted counts and traffic first, then divide. Do not take the unweighted average of channel rates. For example, 10 of 100 and 9 of 900 combine to 19 of 1,000, or 1.9%—not 5.5%.
Before acting: check tracking quality and the reason for the change. A higher rate can reflect a different traffic mix, not a better page. Small samples and target scenarios do not establish a winning experiment.
Found a formula or behavior problem? Send the input, expected result, and page URL—without private customer data.