Media & Data
Basic

Cost Per Mille (CPM)

The cost of reaching one thousand impressions.

Formula

CPM=CostImpressions×1000CPM = \frac{\text{Cost}}{\text{Impressions}} \times 1000

Variables

CostTotal ad spend
ImpressionsNumber of times the ad is shown

Example

$500 for 250,000 impressions → CPM = $2

Did You Know?

"Mille" is Latin for thousand — CPM is simply the cost per thousand views.

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