Formula and curve
Position benchmark × impressions
The calculator maps positions 1–20 to a median CTR curve, then multiplies that rate by monthly impressions. Position 1 uses 27.6%, position 3 uses 10.2%, position 5 uses 5.9%, and position 10 uses 1.8%.
Worked example
With 10,000 monthly impressions, position 5 models 590 clicks and position 3 models 1,020—a difference of 430 clicks without assuming more search demand.
Limitations
Actual CTR varies by brand familiarity, device, query intent, snippet quality, ads, maps, rich results, and other SERP features. Use your Search Console CTR whenever enough first-party data exists; use this curve for scenarios and gap-finding.