Marketing GlossaryCPM: Cost per Mille

CPM: Cost per Mille

June 2025

What is CPM: Cost per Mille?

CPM stands for cost-per-mille.

'Mille' is French for one thousand, and so CPM refers to the cost per thousand emails sent.

Understanding the CPM helps email marketers work out their overall ROI.

Example

If an email marketing platform charges $50 for sending 10,000 emails, the CPM would be $5 (since you're paying $5 for every 1,000 emails sent). This metric helps marketers compare the cost-effectiveness of different email service providers and calculate the true cost of their email campaigns.

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