Formula or calculation method
CPM = advertising spend ÷ impressions × 1,000. Cost = CPM × impressions ÷ 1,000. Impressions = cost ÷ CPM × 1,000.
Marketing
CPM Calculator
Calculate CPM, campaign cost, or impressions by entering any two values and leaving the value you want to solve blank.
CPM measures media delivery cost, not campaign profitability. Evaluate reach alongside clicks, conversions, revenue, audience quality, and attribution.
How to use this tool
How to use the CPM Calculator
Use spend and impressions to calculate CPM, spend and CPM to estimate impressions, or impressions and CPM to estimate campaign cost.
- Enter exactly two known campaign values.
- Leave the value you want to calculate blank.
- Calculate and compare the result with campaigns using the same currency, date range, and impression definition.
What the result means
CPM is the average cost for one thousand recorded ad impressions. It describes delivery efficiency, not the quality or business value of those impressions.
Worked example
$2,500 in spend across 400,000 impressions equals a $6.25 CPM. At that CPM, a $5,000 budget would buy about 800,000 impressions.
Common mistakes
Do not mix currencies or reporting periods, confuse impressions with reach, or compare platforms without checking viewability, placement, audience, and billing definitions.
When to use it
Use it for media planning, display and social campaign comparisons, publisher quotes, sponsorship pricing, and budget scenarios.
Common questions
CPM Calculator FAQ
How do I calculate CPM?
Divide campaign spend by impressions, then multiply by 1,000. For example, $2,500 divided by 400,000 impressions times 1,000 equals $6.25 CPM.
Can I calculate impressions from CPM and budget?
Yes. Divide budget by CPM and multiply by 1,000. Leave the impressions field blank and enter the other two values.
Is a lower CPM always better?
No. A lower CPM can buy cheaper delivery, but audience relevance, viewability, clicks, conversions, and revenue determine whether the campaign creates value.
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