Conversion Rate Calculator.
Enter your visitors, conversions, ad spend, and revenue per conversion to instantly see your conversion rate, cost per conversion, and campaign ROI.
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CVR vs CPA
Conversion rate tells you what percentage of traffic converts. Cost per conversion (CPA) tells you what that traffic actually cost you. A campaign can have a strong conversion rate and still lose money if traffic acquisition cost is too high relative to revenue per conversion.
Reading the ROI Number
ROI above 0% means the campaign is profitable; below 0% means you're spending more than you're earning back. Many marketers target a minimum 20–30% ROI before scaling a campaign's budget further.
Conversion Rate, CPA & ROI Methodology.
The Calculation Branch
Industrial Standards.
The calculator divides conversions by total visitors to get conversion rate, divides spend by conversions to get cost per conversion, multiplies conversions by revenue-per-conversion to estimate total revenue, then computes ROI as profit (revenue minus spend) relative to spend. All four numbers should be read together — none of them alone tells you whether a campaign is working.
In-Depth Analysis & Reference Data
Conversion rate varies enormously by traffic source and funnel stage. Top-of-funnel display ads commonly convert at 0.5–1.5%, branded search traffic at 5–15%, and retargeting campaigns at 8–20% because the audience has already shown intent. When comparing your numbers to industry benchmarks, always match the traffic source and offer type — comparing a cold Facebook ad's conversion rate to a branded email campaign's rate is not a fair comparison.
To improve conversion rate without increasing spend: reduce form fields, add social proof near the call-to-action, ensure page load time is under 3 seconds (each additional second can cost 4–7% of conversions), and run A/B tests on one variable at a time. Improving conversion rate by even 1 percentage point compounds significantly when traffic volume is high — it lowers CPA without spending an additional dollar on ads.
Registry Questions & FAQ.
Should I optimize for conversion rate or for ROI?
ROI, almost always. A higher conversion rate that brings in low-value customers can produce worse ROI than a lower conversion rate that brings in high-value customers. Use conversion rate to diagnose funnel friction, but use ROI to decide where to allocate budget.
What counts as a "conversion"?
It depends on your funnel. For e-commerce it's usually a completed purchase. For lead generation it might be a form submission, a demo request, or a newsletter signup. Define one clear conversion event before running this calculator — mixing micro-conversions (clicks) with macro-conversions (purchases) will distort the rate.
Estimates for planning. Always confirm against an authoritative source.