CPM Calculator
Work out your ad budget, CPM or number of impressions. Pick what you want to find, enter the other two values, and the answer appears instantly.
Calculate your campaign
Your numbers stay in your browser. Nothing you type is uploaded or stored.
CPM formulas
CPM (cost per mille) is the price of 1,000 ad impressions. Every result on this page comes from one relationship, rearranged three ways:
Worked examples
| You know | Calculation | Result |
|---|---|---|
| 500,000 impressions at a CPM of 4 | (500,000 ÷ 1,000) × 4 | Budget = 2,000 |
| Budget of 3,000 for 1,500,000 impressions | (3,000 ÷ 1,500,000) × 1,000 | CPM = 2 |
| Budget of 1,000 at a CPM of 5 | (1,000 ÷ 5) × 1,000 | Impressions = 200,000 |
These figures are arithmetic examples only. They are not typical or recommended prices. Real CPMs vary widely by platform, audience, country and time of year.
How to use this calculator
- Choose what you want to find: Total budget, CPM or Impressions.
- Fill in the other two fields. The highlighted field is the answer and updates as you type.
- Check the “How this was calculated” line to see the exact numbers used.
- Pick your currency so the symbols match your campaign. The maths is the same in any currency.
Want the background? Read What is CPM? Definition, formula and how it compares with CPC and CPA.
Frequently asked questions
What does CPM stand for?
CPM stands for cost per mille, where “mille” is Latin for thousand. It is the price an advertiser pays for every 1,000 ad impressions.
How do you calculate CPM?
CPM = (total cost ÷ total impressions) × 1,000. For example, spending 2,000 to get 500,000 impressions gives a CPM of 4.
How do I calculate the budget for a CPM campaign?
Budget = (impressions ÷ 1,000) × CPM. For 500,000 impressions at a CPM of 4, the budget is 2,000.
What is a good CPM?
There is no single good CPM. It depends on the platform, ad format, audience, country and season. Compare your CPM with your own past campaigns, and judge it by the results it delivers, such as clicks or sales, not by the number alone.
Is CPM the same as eCPM?
Not exactly. CPM is usually the price an advertiser pays per 1,000 impressions. eCPM (effective CPM) is the revenue earned, or cost paid, per 1,000 impressions across a mix of pricing models such as CPC or CPA. Learn more about eCPM.
Does this calculator store my numbers?
No. All calculations run in your browser, and the values you type are never sent to a server. See our privacy policy.
This tool gives mathematical estimates for planning. It does not guarantee delivery, prices or results from any ad platform. Always confirm final pricing and terms with the platform or publisher you buy from.