CPM
metricsCost Per Mille (Thousand Impressions)
Definition
The cost to show your ad to 1,000 people. Used to measure the efficiency of brand awareness campaigns.
How to Calculate CPM
Total Ad Spend ÷ (Impressions ÷ 1,000)
Example
Scenario: You spend $100 and get 10,000 impressions
Calculation: $100 ÷ (10,000 ÷ 1,000) = $10 CPM
What's a Good CPM?
$10-$25 for most platforms, higher for premium audiences
Common Mistakes
- Optimizing for low CPM without considering audience quality
- Ignoring frequency when CPMs rise
💡 Expert Tip
Rising CPMs often indicate audience saturation. Expand targeting or refresh creative when CPMs increase 30%+.
— Based on $100M+ in managed ad spend
Related Terms
By Kristijan Arapov • Based on $100M+ in managed ad spend • Updated 2026