CPC and CTR calculator
Cost per click and click-through rate from spend, impressions, and clicks. Runs in your browser; nothing you type is sent anywhere.
Formula
CTR equals clicks divided by impressions, expressed as a percentage. 3,000 clicks on 100,000 impressions is a 3 percent CTR. On social platforms, use link clicks rather than all clicks, and on search compare CTR by match type and position rather than at the account level.
CTR measures the ad's appeal to the people who saw it, not whether they were the right people. It feeds Quality Score on Google and quality ranking on Meta, so it affects price as well as reporting.
Typical ranges are on the benchmarks pages; definitions in the glossary.