CPM
Cost per thousand impressionsLoading calculator…
Use this free CPM calculator to solve for budget, CPM, or impressions in seconds. CPM (cost per mille) is the price of 1,000 ad impressions — the core unit of media pricing across display, video, social, and programmatic buys.
Enter any two values and Media Math Pro computes the third, showing the formula, the substituted equation, and a worked breakdown so you can check the math and explain it.
CPM examples
Find your budget
At a $12.50 CPM across 400,000 impressions, budget = (12.50 × 400,000) ÷ 1,000 = $5,000.
Find impressions from a budget
With a $5,000 budget at a $12.50 CPM, impressions = (5,000 ÷ 12.50) × 1,000 = 400,000.
Find the CPM
A $5,000 spend that delivered 400,000 impressions works out to a $12.50 CPM.
Frequently asked questions
- How do I calculate CPM?
- CPM = (Budget ÷ Impressions) × 1,000. Divide your total spend by the number of impressions, then multiply by 1,000.
- How many impressions can I buy with $50,000?
- Divide the budget by the CPM and multiply by 1,000. At a $10 CPM, $50,000 buys (50,000 ÷ 10) × 1,000 = 5,000,000 impressions.
- What CPM do I need to hit 10 million impressions?
- CPM = (Budget ÷ 10,000,000) × 1,000. With a $100,000 budget that's a $10 CPM; with $50,000 it's a $5 CPM.
- What is a good CPM?
- It varies widely by channel, format, targeting, and seasonality, so there's no universal benchmark. Use CPM to compare like-for-like placements rather than as an absolute target.
- What's the difference between CPM and CPC?
- CPM prices 1,000 impressions, while CPC prices a single click. Use the CPC calculator when you're buying or measuring on clicks instead of impressions.