How to Calculate CPM
CPM is calculated as: CPM = (Total Ad Spend / Total Impressions) x 1,000. For example, if you spend $500 and receive 200,000 impressions, your CPM is $2.50. Most ad platforms report CPM automatically. In Google Ads, CPM bidding (vCPM) is available for Display and Video campaigns. Meta Ads uses CPM as the default billing model across all campaign objectives, though the platform optimizes delivery based on your chosen goal rather than raw impressions.