What is eCPM (Effective Cost Per Mille)?
The eCPM metric, which is short for Effective Cost per Mille, represents the revenue a publisher earns for every 1,000 ad impressions it generates for advertisers.
There are two sides to eCPM: the monetization side and the user acquisition side.
To calculate eCPM on the monetization side, divide your app’s total earnings from advertising by the total number of impressions your app generated. Then multiply that number by 1,000.
Here’s the formula: eCPM = (Total Earning / Total Impressions) x 1,000
To calculate eCPM on the user acquisition side, multiply your IPM (Install per 1,000 Impressions) by your CPI (Cost per Install).
The formula looks like this: eCPM = IPM x CPI