CPM Calculator
Work out your cost per thousand impressions from advertising cost and impressions.
CPM
£2.50
- Cost per impression
- £0.0025
v1.0 · Reviewed September 2026
How this is worked out
Cost per thousand impressions is cost ÷ impressions × 1,000.
Worked example
- Advertising cost £500.00
- Impressions 200,000
500 ÷ 200,000 × 1,000
£2.50 CPM
Assumptions and limits
- An impression means the advert was served, which is not the same as it being seen or measured as viewable.
- The cost per impression line is shown to four decimal places because it is usually a fraction of a penny.