📈 Online Marketing Conversion Calculator
Calculate your website or campaign’s conversion rate and cost per conversion from visitor and spend data.
1
2
3
$
What is a conversion rate?
Conversion rate measures the percentage of website or campaign visitors who complete a desired action — a purchase, signup, or lead form — out of all visitors.
The formulas
- Conversion Rate = (Conversions / Visitors) × 100
- Cost per Conversion = Total Spend / Conversions
Tracking these two numbers together helps marketers judge both how effective a page or funnel is, and how efficiently paid traffic is turning into results.
This calculator is for general marketing planning and education.
Last reviewed August 2026