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Marketing calculator
Calculate cost per thousand impressions from advertising spend and delivered impressions.
Enter your figures
Estimate only. Platform fees, taxes and policies vary by country, account, category and date. Verify important decisions against your current statement or official fee schedule.
Calculator guide
CPM expresses advertising cost for each one thousand impressions. Enter total cost and impressions from the same campaign scope and reporting period.
Confirm whether the platform reports served impressions, measurable impressions or viewable impressions. Standard CPM and viewable CPM use different impression definitions and should not be compared as though they are identical.
CPM is useful for reach and awareness planning, but it does not measure clicks, conversions or incremental sales. Frequency and audience overlap can also reduce the value of additional impressions.
Compare CPM with reach, frequency, viewability, CTR and downstream conversion outcomes. A higher CPM can still be efficient when the audience is more valuable or inventory quality is better.
Formula
CPM = Total advertising cost ÷ Impressions × 1,000
Worked example
Rounded values; replace assumptions in the live calculator.
Frequently asked questions
Verify the time period, population, currency, attribution and revenue or cost definition. Save those assumptions with the report so future comparisons use the same scope.
The arithmetic follows the displayed formula. Accuracy depends on using complete inputs from the same reporting period and applying one consistent definition to customers, revenue and costs.
Yes. Keep every monetary input in the same currency. Ratios and percentages remain comparable, but the calculator does not perform foreign-exchange conversion.
Use the revenue definition that matches your reporting purpose and keep it consistent across periods. Document whether discounts, refunds, credits and taxes are included.
A single month can be distorted by seasonality, annual renewals, campaigns or one-off contracts. Compare a consistent monthly or quarterly series before making a decision.
No. It is an independent planning tool. Reconcile the result with your billing platform, analytics system and financial reporting policies.
No. Calculations run locally in the browser and do not require sending calculator inputs to a server.
Primary sources
Official definition of cost per thousand impressions.
Official formula for connecting impressions with clicks.
Editorially reviewed: 2026-07-21
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