Cpm Calculator

CPM — cost per mille, per thousand impressions — is how brand advertising is priced and compared. This calculator solves the CPM triangle in any direction: find the CPM from cost and impressions, the cost of a planned impression volume, or the impressions a budget buys — and it reports the cost of a single impression alongside.

The Formula, All Three Ways

$\text{CPM} = \frac{\text{Cost}}{\text{Impressions}} \times 1{,}000 \qquad \text{Cost} = \frac{\text{CPM} \times \text{Impressions}}{1{,}000} \qquad \text{Impressions} = \frac{\text{Cost}}{\text{CPM}} \times 1{,}000$

$\text{Cost per impression} = \frac{\text{Cost}}{\text{Impressions}}$

| Solve for | You enter | Example | | --- | --- | --- | | CPM | Cost + impressions | $2,500 and 500,000 impressions → **$5.00 CPM** | | Cost | CPM + impressions | $12.50 CPM × 2,000,000 impressions → **$25,000** | | Impressions | Budget + CPM | $1,000 at$8 CPM → 125,000 impressions |

The first example in full: $2,500 ÷ 500,000 =$0.005 per single impression, and $0.005 × 1,000 =$5.00 per mille. That per-impression figure — five thousandths of a dollar — is why the industry quotes per thousand: human brains compare $5 vs$12.50 CPM far more reliably than $0.005 vs$0.0125.

Benchmarks and What Moves CPM

The calculator's guidance bands: display ads typically average $2–$10 CPM, social ads $5–$15, and premium video higher. Treat those as orientation, not verdicts. CPM rises with narrow targeting (fewer eligible impressions, more bidders per impression), wealthy geographies, premium placements (pre-roll video, homepage takeovers), and fourth-quarter advertiser competition; it falls with broad audiences, remnant inventory, and low-purchasing-power geos. A high CPM is not automatically bad — a $50 LinkedIn CPM reaching verified decision-makers can outperform a$2 CPM sprayed at bots and banner-blind scrollers. Judge CPM next to what the impressions are for: reach and frequency for awareness, or feed it into the funnel math (below) for performance.

CPM Among Its Sibling Metrics

CPM prices visibility — you pay whether or not anyone clicks. CPC prices the click; CPA prices the completed action. The three interconvert: a campaign bought on CPC has an effective CPM of CPC × CTR × 1,000 (a $0.50 click at a 1$5.00 eCPM), which is how publishers compare offers across buying models. And CPM is not reach: 500,000 impressions at an average frequency of 5 reached only 100,000 people — pair this calculator with the ad frequency thinking elsewhere on this site when planning how hard to push a fixed audience before fatigue sets in. Finally, impressions are counted when served, not when seen — viewability rates and invalid-traffic filtering explain much of the gap between a cheap CPM and a good one.

Frequently Asked Questions

What is a good CPM?

One that buys the right audience at a defensible price for your category: single digits for broad display, $5–$15 across much of social, and well above that for premium video or tightly targeted B2B. Compare against your own historical campaigns and your funnel economics, not against a universal table.

Why quote per thousand instead of per impression?

Because per-impression prices live in fractions of a cent ($0.005), where comparisons and budgets become error-prone. "Mille" is Latin for thousand; the convention dates to print advertising rate cards, long before digital impressions existed.

Is a lower CPM always better?

No. CPM says nothing about viewability, audience quality, brand safety, or downstream action. A cheap impression nobody sees, or that reaches people who can never buy, is expensive at any price — which is why mature buyers track CPM alongside CTR, frequency, and cost per result.