Interactive tool · Formula transparent
OOH CPM calculator
Solve for CPM, media cost or modeled impressions. The tool performs arithmetic; it does not certify that two impression estimates are comparable.
Choose the unknown.
Enter positive values. Commas and currency symbols are accepted; results are rounded for display.
What the sources support.
Claims below reproduce the scope of the page contract. Derived items show their calculation.
- derived
CPM is calculated as media cost divided by impressions and multiplied by 1,000.
CPM = Cost ÷ Impressions × 1,000 - verified
The MRC public-comment draft says OOH measurement techniques vary by format and location and that inherent limitations should be studied and disclosed.
Before you calculate
Use the same currency, campaign scope and impression definition. Decide whether fees are included in cost and retain the provider’s audience-method label with the result.
Formula set
CPM = cost ÷ impressions × 1,000. Cost = CPM × impressions ÷ 1,000. Impressions = cost ÷ CPM × 1,000.
Result boundary
A mathematically correct CPM can still be a misleading comparison when one denominator measures traffic and another estimates viewable or viewed impressions.
Sources for this page
- OAAACurrent guide pageOOH Measurement & Analytics Guide (opens in a new tab) ↗
Used for: Planning, transaction, measurement and attribution concepts.
- Media Rating CouncilNovember 2023 draftOOH Measurement Standards — Public Comment Draft (opens in a new tab) ↗
Used for: OOH measurement terms, format-dependent techniques and disclosure of limitations.