What this calculator measures
Calculate advertising cost per thousand impressions.
CPM standardizes the cost of delivered impressions. Enter values from the same reporting period and retain the source data so the result can be reproduced.
Common use cases
Use this model when the inputs describe the same decision, period and customer or product scope.
- Calculate advertising cost per thousand impressions.
- Use the result with the recorded inputs: Advertising spend, Impressions.
- Compare multiple scenarios before making a marketing decision.
Formula
CPM standardizes the cost of delivered impressions.
CPM: formula, inputs and interpretation
CPM standardizes the cost of delivered impressions.
Formula
Example input values
Worked calculation and answer
$12,000 across three million impressions produces a $4.00 CPM.
Variable definitions and checks
- Advertising spend (spend): Use a numeric value at least 0. Check its reporting period and definition before comparing it with other inputs.
- Impressions (impressions): Use a numeric value at least 0. Check its reporting period and definition before comparing it with other inputs.
When the result may mislead
The calculation reflects the variables named above, not unentered taxes, platform terms, reporting delays, financing charges or external forecasts. For comparisons, keep the same units and reporting period and change one assumption at a time.
How to interpret the result
Verify viewability, frequency, audience quality, fraud controls, and downstream outcomes.
Use the result as a decision aid rather than a standalone conclusion. Compare trends and scenarios using unchanged definitions.
Assumptions and limitations
- Inputs use compatible periods and definitions.
- Amounts are entered before rounding unless stated otherwise.
- The model excludes fields not shown in the calculator.
- Material accounting, tax, legal, and investment decisions require independent verification.
Frequently asked questions
What does CPM measure?
CPM standardizes the cost of delivered impressions.
How should I compare results?
Use the same definitions, currency, period, and data source for every comparison.
Is this result a forecast?
No. It is a deterministic estimate based only on the values entered and does not predict future conditions.