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Tuesday, November 3, 2009

what is eCPM?

eCPM stands for Effective cost-per-thousand impressions. eCPM is a useful way to compare revenue across different channels and advertising programs. Essentially, effective CPM shows your estimated earnings for every 1000 impressions on your site.

Effective CPM is calculated by dividing your earnings by the number of page impressions, then multiplying by 1000.


For example, if you earned $0.15 from 25 page impressions, then your eCPM would be ($0.15/25)*1000 which is equal to $6.00. If you earned $180 from 45,000 impressions, your effective CPM would equal ($180/45,000)*1000 which is $4.00.

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