Definition
The average cost to reach one thousand ad impressions.
Formula
(Total ad spend / Impressions) x 1000
How to measure
Divide total ad spend by total impressions delivered, then multiply by 1,000.
Why track it
CPM is used to compare raw reach efficiency between channels, independent of how well the creative converts once seen.
Example
A display campaign spending $300 for 150,000 impressions reports a $2.00 CPM.
FAQ
- What is Cost Per Mille?
- The average cost to reach one thousand ad impressions.
- How do you calculate Cost Per Mille?
- (Total ad spend / Impressions) x 1000
- Why track Cost Per Mille?
- CPM is used to compare raw reach efficiency between channels, independent of how well the creative converts once seen.