# CPM and impressions calculator

> Free CPM calculator: work out CPM from value and impressions, or estimate impressions from a value and a CPM. Every result is labeled estimated.

Source: https://psareach.com/tools/cpm-calculator/

Free calculator

Check whether a value makes sense for the audience it reached. Work out the CPM from value and impressions, or estimate impressions from a value and a CPM.

`CPM = value ÷ impressions × 1,000Impressions = value ÷ CPM × 1,000`

## Your figures

Example figures are filled in. Replace them with yours.

Solve for

 CPM Impressions

Estimated value ($)

Commercial-equivalent value of the airtime, or the spend for paid media.

Estimated impressions

Gross impressions for the same airings.

## Results

Estimated CPM Estimated

$11.31

Value ÷ impressions × 1,000

Estimated impressions Estimated

1,625,000

The figure you entered

Estimated value Estimated

$18,375

The figure you entered

Impressions worked out from a CPM stack one estimate on another, so label them as a CPM-derived estimate.

## How it is calculated

The same formulas as the methodology page, applied to the figures you enter.

[Read the full guide](https://psareach.com/insights/how-to-calculate-donated-media-value/)

`CPM = Estimated value ÷ Estimated impressions × 1,000` `Estimated impressions = Estimated value ÷ CPM × 1,000` `Estimated value = CPM × Estimated impressions ÷ 1,000`

**For donated broadcast, both inputs are estimates,** so the CPM is too. For paid digital media the platform reports spend and impressions, and the CPM is measured.

**Use the implied CPM as a sanity check.** A figure far outside the normal range for the market and daypart usually means a rate went on the wrong daypart or an audience figure on the wrong demographic.

## Questions about the calculator

Can't find what you need here? Ask us directly.

[Talk to PSAReach](https://psareach.com/contact/)

What does CPM stand for?

Cost per thousand. The M is the Roman numeral for 1,000. Donated airtime has no cost, so for a PSA the CPM is the estimated value of a thousand impressions.

When should I work out impressions from a CPM?

When there's no direct audience estimate but there is a well-supported value and a market CPM benchmark. The result stacks one estimate on another, so label it a CPM-derived estimate.

Can I compare a donated CPM with a paid digital CPM?

Yes, that's what CPM is for: it puts broadcast and digital delivery on one scale. Keep the labels, though. The paid CPM is measured and the donated one is estimated.

## Other calculators

-   [Donated media value calculator Estimate the commercial-equivalent value of donated airings, with the formula shown. Open](https://psareach.com/tools/donated-media-value-calculator/)
-   [GRP calculator Estimated GRP from gross impressions and a universe, or from a list of ratings. Open](https://psareach.com/tools/grp-calculator/)
-   [All calculators The three free tools, with the formula behind each. Open](https://psareach.com/tools/)

## Want value and impressions from verified airings?

We estimate both for each airing and check the implied CPM before anything goes in your report.

[Talk to PSAReach](https://psareach.com/contact/) [See a sample report](https://psareach.com/sample-report/)