# CPM Calculator

> CPM: CPM = cost ÷ impressions × 1,000. Methodology stated, your own inputs only.

Page: https://freecalculator.tech/tools/cpm-calculator
Last reviewed: 2026-10-15

## Formula

CPM = cost ÷ impressions × 1,000.

- Methodology: IAB definition — cost per thousand ad impressions.
- Impressions are as counted by your ad server or platform.
- Viewable CPM (vCPM) uses viewable impressions instead.
- CPM = cost ÷ impressions × 1,000.
- Inputs used: Currency (symbol only, never converted), Campaign cost, Impressions.

## Inputs

- Currency (symbol only, never converted)
- Campaign cost
- Impressions

## Worked example: A display campaign

$2,500 for 400,000 impressions.
1. 2,500 ÷ 400,000 × 1,000 = $6.25.

## Common questions

### Why per thousand?

Single impressions cost fractions of a cent; per-thousand is easier to compare. Check the formula, example, and limitations on this page before using the result for a real marketing decision.

### CPM vs vCPM?

vCPM counts only impressions meeting a viewability standard. Check the formula, example, and limitations on this page before using the result for a real marketing decision.

### What is a good value?

It depends on channel, audience and industry. We don't assume a benchmark — compare against your own campaigns.

### How do I use the CPM Calculator?

Enter the required values for Currency (symbol only, never converted), Campaign cost, Impressions. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the CPM Calculator use?

CPM = cost ÷ impressions × 1,000. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

### Can the CPM Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Platform impression counts differ.
- Says nothing about results.
- Results are educational estimates built only from the figures you enter. They are not personalised investment, tax, legal or accounting advice. Rates, growth and discount assumptions are always yours to choose.
- The result depends on the values you enter for this cpm calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- IAB — https://www.iab.com/insights/glossary-of-terminology/

## Cite this page

- APA: Free Calculator. (2026, October 15). CPM Calculator. https://freecalculator.tech/tools/cpm-calculator
- MLA: "CPM Calculator." Free Calculator, 15 Oct. 2026, https://freecalculator.tech/tools/cpm-calculator.
- Link: CPM Calculator — Free Calculator, https://freecalculator.tech/tools/cpm-calculator