What is CPM (Cost Per Mille)?

CPM, or Cost Per Mille, is the cost per thousand ad impressions. 'Mille' is Latin for thousand. It is the standard unit for comparing the cost of reaching an audience across platforms, formats, and campaigns.

How do you calculate CPM?

Divide your total ad spend by the number of impressions, then multiply by 1,000. The formula is CPM = (Total Ad Spend / Total Impressions) x 1,000. For example, a $400 campaign delivering 100,000 impressions has a CPM of $4.00.

Is this CPM calculator free to use?

Yes. The CPM calculator is completely free, requires no sign-up, and runs entirely in your browser. The values you enter are never sent to or stored on our servers.

Terms of Service

Last updated: June 18, 2026

These Terms of Service ("Terms") govern your access to and use of cpmcalculator.net (the "Site") and the free CPM calculator and related content we provide. By using the Site, you agree to these Terms. If you do not agree, please do not use the Site.

Use of the Site

We provide the CPM calculator and accompanying information free of charge for your personal and professional use. You may use the Site to calculate cost per thousand impressions and related figures for your own media-planning purposes. You agree not to misuse the Site, interfere with its normal operation, attempt to gain unauthorized access to it, or use it for any unlawful purpose.

No professional advice

The calculator and all content on this Site are provided for general informational purposes only. They do not constitute financial, marketing, legal, or other professional advice. Results are estimates based on the values you enter and standard CPM formulas. You are responsible for verifying any figures before relying on them for budgeting, purchasing, or business decisions.

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We strive to keep the calculator accurate and reliable, but we make no guarantee that results will be free of errors or suitable for any particular purpose. The calculator performs arithmetic on the inputs you provide; the accuracy of any result depends on the accuracy of those inputs.

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