Conversion Rate Calculator
Calculate the percentage of eligible interactions that resulted in conversions.
How this calculator works
Conversion Rate = Conversions / Eligible Interactions × 100.
Use the denominator that matches your reporting system. In Google Ads, conversion rate uses eligible ad interactions.
Example
50 conversions from 1,000 eligible interactions gives a conversion rate of 5%.
Source and metric note
Google Ads defines average CPC as total click cost divided by total clicks. It defines conversion rate as conversions divided by eligible ad interactions. Google Ads also reports conversion value per cost as conversion value divided by total ad-interaction cost.
Google Ads - Avg. CPC - Google Ads - Conversion rate
Last reviewed: 27 August 2026.
Frequently asked questions
Can conversion rate be over 100%?
It can be in reporting systems that count more than one conversion from a single interaction.
Should I use clicks, sessions or users as the denominator?
Use the denominator defined by the platform or analysis you are performing, and stay consistent when comparing results.
Is conversion rate enough to judge campaign performance?
No. Consider conversion value, cost, profit quality and business goals as well.