How this CPM Calculator works
CPM normalizes media cost to one thousand impressions so campaigns can be compared more easily.
Formula
(Ad spend ÷ Impressions) × 1,000
Worked example
500 of ad spend across 100,000 impressions is a 5 CPM.
How to interpret the result
CPM expresses media cost per 1,000 impressions.
Common mistakes and limits
Keep spend and impressions in the same scope and period, and remember the factor of 1,000.
Frequently asked questions
Why is CPM useful?
It is useful for comparing the relative cost of reach or impressions across campaigns and channels.
Important note
WorkTools provides general-purpose informational calculations. Verify inputs, definitions, policies and jurisdiction-specific requirements before using a result for financial, payroll, legal or other consequential decisions.