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Last Updated: May 11, 2025

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What is eCPM?

The effective cost per thousand ad impressions. eCPM is used as a tool by advertisers when they are comparing ad networks or evaluating the success of an ad-based monetization strategy.

eCPM is calculated by dividing total earnings by total number of impressions in thousands. It is a great performance measure for your various ad units, so when comparing, we use eCPM to compare your results.

The formula is: (Total Spend ÷ Impressions) x 1000

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