CPM (Cost per Mille)
CPM is the cost of 1,000 ad impressions.
CPM is the standard way to price reach on social, video and display ads. Mille is Latin for thousand.
CPM varies by platform, audience, country and season. A higher CPM can still be efficient if the audience converts well.
Formula
CPM = Ad cost ÷ Impressions × 1,000
Example
A campaign costs 1,500 for 250,000 impressions, a CPM of 6.
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Common questions
Is a lower CPM always better?
No. Cheap impressions to the wrong audience rarely convert.
What is the difference between CPM and CPC?
CPM prices reach; CPC prices clicks.