The eCPM formula
eCPM = (total earnings ÷ total impressions) × 1,000. Example: $12 from 8,000 impressions = $1.50 eCPM.
- CPM: what an advertiser bids per 1,000 impressions
- eCPM: what you actually earned per 1,000
- RPM: revenue per 1,000 page views or sessions
- Fill rate: share of requests that got an ad