Business
Instant, private, and free
Conversion Rate Calculator.
Calculate a conversion percentage with optional funnel stages and explicit denominators.
Set your values
Results update as you type.
Optional funnel stages
Each stage is conversions ÷ that stage's eligible opportunities; benchmarks are intentionally not included.
FAQs
What is the conversion rate formula?
Conversion rate equals conversions divided by eligible opportunities, multiplied by 100. The denominator must be defined for the metric to be meaningful.
Cite this calculator
Canonical URL: https://mathify.one/en/business/conversion-rate
Cite as: Mathify. (2026). Conversion Rate Calculator. https://mathify.one/en/business/conversion-rate
Use Cases
Measure overall marketing effectiveness
Determine the percentage of leads that become customers to evaluate the success of your marketing campaigns and identify areas for improvement.
Example: If you had 1,000 leads and 150 purchases, your conversion rate is 15%.
Analyze funnel stage performance
Use the calculator to compute conversion rates for each stage of your sales funnel, such as from visitor to lead, or from lead to sale, to pinpoint bottlenecks.
Example: Calculate the rate from 'add to cart' to 'checkout' to see how many shoppers complete the purchase.
Frequently Asked Questions
- How do I calculate conversion rate?
- Divide the number of conversions by the number of eligible opportunities, then multiply by 100 to get a percentage. For example, 50 conversions out of 200 eligible opportunities gives a conversion rate of 25%.
- What are eligible opportunities?
- Eligible opportunities are the total number of potential customers or leads that had the chance to convert. This is the denominator in the conversion rate calculation. It should include only those who were actually eligible to make the conversion.
- Can I use this calculator for multiple funnel stages?
- Yes, the calculator allows you to inspect independent funnel-stage rates. You can enter the eligible opportunities and conversions for each stage separately to see the conversion rate at that specific point in your funnel.
Tips & Common Mistakes
Tips
- Ensure 'eligible opportunities' includes only those who had a real chance to convert, excluding unqualified leads.
- Use consistent time periods for both numbers to get an accurate conversion rate.
- Compare your conversion rate against industry benchmarks to gauge performance.
- Track conversion rates over time to spot trends and measure the impact of changes.
Common Mistakes to Avoid
- Including ineligible leads in the denominator, which lowers the conversion rate artificially.
- Using different time frames for opportunities and conversions, leading to misleading results.
- Confusing conversion rate with total revenue or number of conversions alone.
Last updated: August 13, 2026