# CPM Calculator

> CPM calculator: convert ad spend, impressions, and revenue into cost per mille and publisher RPM to price any campaign. Free, private, runs in your browser.

- **Canonical URL:** https://boringtoolskit.com/cpm-calculator/
- **Category:** Seller & Business
- **Evidence level:** authored-methodology
- **Reviewed:** August 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

CPM = cost ÷ impressions × 1000. Given any two of cost, impressions, and CPM, the third is determined. Estimated ad revenue = pageviews ÷ 1000 × page RPM.

## Worked example

A $1,000 campaign that serves 500,000 impressions has a CPM of (1000/500000)×1000 = $2.00. Conversely, 100,000 monthly pageviews at a $15 RPM yields 100 × $15 = $1,500 per month in estimated revenue.

## Assumptions

- CPM is defined as cost per 1,000 impressions.
- RPM (revenue per mille) already accounts for fill rate and blended ad formats.
- Revenue estimates are based on the values you enter and are planning aids, not guarantees.

## Common questions

### What is CPM?

CPM stands for cost per mille (thousand). It is the cost of 1,000 ad impressions: CPM = cost ÷ impressions × 1000.

### How do I calculate CPM?

Divide the campaign cost by the number of impressions and multiply by 1,000. A $1,000 campaign with 500,000 impressions has a CPM of $2.00.

### What is the difference between CPM and RPM?

CPM is the cost per 1,000 ad impressions (advertiser's view); RPM is the revenue per 1,000 pageviews (publisher's view). RPM already factors in fill rate and ad mix.

### How do I estimate ad revenue from pageviews?

Multiply pageviews ÷ 1000 by your page RPM. For 100,000 pageviews at $15 RPM that is $1,500 per month.

### Can I calculate impressions or cost from CPM?

Yes. Impressions = (cost ÷ CPM) × 1000, and cost = (CPM × impressions) ÷ 1000. This calculator solves any of the three from the other two.

## Related tools

- /marketplace-ad-break-even-calculator/
- /commission-calculator/
- /break-even-units-calculator/

## Sources

- [About CPM revenue and CPM rates](https://support.google.com/admanager/answer/3271395)
- [Digital Advertising Glossary](https://www.iab.com/insights/glossary/)

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*Local planning estimate. Verify current terms, rates, and policies before acting.*