How to use the SERP click share calculator
Click share divides your clicks by all clicks generated on the same keyword. The denominator being clicks rather than impressions is the whole point: the question is not how often your listing appeared but what share of the clicks that actually happened came to you. That makes it a different metric from impression share, and the two move independently. Wide visibility paired with low click share usually points at the title and description rather than the position.
The two impression fields are optional. Enter both your impressions and total impressions to compare impression share on the same screen, or enter your impressions alone to see your own CTR. Leave them empty and those result rows stay hidden entirely.
Search engines do not publish total clicks, so that figure comes from combining estimated keyword volume with measured CTR by position, or from a third-party traffic estimate. Changing the estimation method changes the denominator and therefore the share, so keep one method for as long as you are tracking a trend.
Frequently asked questions
It is an estimate, since search engines do not report it. Multiply estimated keyword volume by measured CTR per position and add them up, or use a third-party traffic estimate. Fix the method so periods stay comparable.
Yes. Plenty of impressions with few clicks gives a high impression share and a low click share. In that case rewriting the title and description comes before chasing a better position.