MihsabaHow to use
Calculate cost per thousand impressions and average cost per impression from total advertising spend and recorded impressions.
- Enter Advertising spend.
- Enter Number of impressions.
- Calculate, then review the results and method assumptions.
How it is calculated
Example
Spend of 200 for 50,000 impressions gives CPM of 4 and cost per impression of 0.004. At 100,000 impressions with unchanged spend, CPM is 2.
Important notes
Impressions are not unique people: one person may see an ad repeatedly. Do not substitute reach or viewable impressions unless your comparison uses that same definition.
Worked examples and interpreting results
Spend of 200 for 50,000 impressions gives CPM of 4 and cost per impression of 0.004. At 100,000 impressions with unchanged spend, CPM is 2.
| Case | Calculation | Result |
|---|---|---|
| Per thousand impressions | 200 ÷ 50000 × 1000 | 4 |
| Per impression | 200 ÷ 50000 | 0.004 |
How to check the result
Impressions are not unique people: one person may see an ad repeatedly. Do not substitute reach or viewable impressions unless your comparison uses that same definition.
Frequently asked questions
Why multiply by one thousand?
CPM expresses the cost of a thousand impressions; one impression costs CPM divided by one thousand.
Does CPM measure sales?
It measures delivery cost only. Examine clicks and conversions separately to understand later campaign stages.
Does this convert currencies or import campaign data?
It uses only entered numbers, without import or currency conversion. Align currency, period and metric definitions in your source before entering values.