CPM Calculator
Calculate CPM (cost per mille — the cost of 1,000 ad impressions), or use a known CPM to work out what a campaign will cost or how many impressions your budget buys.
CPM = cost ÷ impressions × 1,000. Ad platforms may count impressions differently (for example, viewable vs served), so use the figures from the same report.
$2.00
CPM
$100.00
Total cost
50,000
Impressions
Each single impression costs $0.002.
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How to use cpm calculator
- 1Choose what to calculate: CPM, total cost or impressions.
- 2Enter the two values you know, such as campaign cost and impressions.
- 3Pick your currency.
- 4Read the result, along with the cost of a single impression.
About this tool
CPM stands for cost per mille — mille is Latin for thousand. It's the standard way to price display, video, social and podcast advertising, because it lets you compare campaigns of very different sizes. The formula is CPM = cost ÷ impressions × 1,000.
Example: spending $100 for 50,000 impressions gives a CPM of $100 ÷ 50,000 × 1,000 = $2. Working backwards, a $2 CPM means a $500 budget buys 250,000 impressions, and 1 million impressions would cost $2,000.
CPM only measures how cheaply you reach people, not whether they act. Pair it with click-through rate, CPC and conversion rate to judge performance, and make sure impressions and cost come from the same report — platforms may count served, viewable or unique impressions differently.
Frequently asked questions
Cost per mille, or cost per thousand impressions: how much you pay each time an ad is shown 1,000 times.
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