Here's an example of how to calculate your average CPC. Let's say your ad gets two clicks, one costing $0.20 and one costing $0.40, for a total cost is $0.60. You'd divide $0.60 (your total cost) by 2 (your total number of clicks) to get an average CPC of $0.30. You can find your average CPC amounts in the "Avg.