CPM calculator

Calculate cost per thousand impressions, or work backward from CPM to estimate a budget or delivery volume.

Use totals for the same period and one currency. Choose the value you need, then enter the two known values.

Calculate

Spend / budget Use the same cost basis, including or excluding fees consistently.

Impressions Use the reported count.

CPM Rate in the same currency as spend.

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The formula

CPM = spend ÷ impressions × 1,000

Spend = CPM × impressions ÷ 1,000

Estimated impressions = spend ÷ CPM × 1,000

Worked example · sample data

500 in spend and 100,000 impressions gives a CPM of 5.00.

This is impression-based CPM. For viewable CPM, use the viewability calculator with viewable impressions.

To combine campaigns, add their spend and volume first. Do not average their individual cost rates.

Estimated impressions or clicks are rounded down to whole units. A target rate does not guarantee that volume.