What Is CPM (Cost Per Mille)?

CPM (Cost Per Mille — "mille" being Latin for thousand) measures how much it costs to reach one thousand impressions of a piece of content. It's one of the oldest metrics in advertising, predating digital marketing entirely, and it's still the standard way awareness-stage reach is priced and compared across both paid ads and influencer content.

The formula

CPM = (total cost ÷ total impressions) × 1,000.

A worked example

A creator is paid $300 for a post that generates 150,000 impressions. CPM = ($300 ÷ 150,000) × 1,000 = $2.00 — meaning it costs $2 to reach every 1,000 impressions of that content.

Why it matters for influencer marketing specifically

CPM is the metric that lets a brand compare the cost-efficiency of influencer content directly against traditional paid advertising, since both are priced using the same underlying unit. This is also the mechanism behind What Is EMV (Earned Media Value) — EMV estimates typically value a creator's organic impressions against an equivalent paid-media CPM, which is how "earned" exposure gets converted into a comparable dollar figure.

CPM vs. CPV — what's the difference?

CPM measures cost per 1,000 impressions (how many times content was shown, including to the same person more than once); CPV (see What Is CPV (Cost Per View)) measures cost per individual view, which on video platforms usually requires a minimum watch duration to count — a more engagement-adjacent metric than a raw impression count. Both are reach-efficiency metrics, used at the awareness stage of a campaign, but they're not interchangeable since they count different things.

Where CPM shows up elsewhere on this site

Digital Pakistan's 2026 guide reports typical Facebook advertising CPM in Pakistan around PKR 150-1,100, cited in Influencer Marketing for Pakistani FMCG & Finance Brands as a reference point for the platform's broad, relatively low-cost reach. This is paid-advertising CPM specifically, not influencer-content CPM — the two are related but calculated from different cost bases, worth keeping distinct when comparing numbers.

What's a "good" CPM?

As with the other cost-efficiency metrics on this site, there's no single universal benchmark — CPM varies significantly by platform, format, audience targeting precision, and market. Calculate your own acceptable CPM ceiling based on what reach is actually worth to your specific campaign goal, the same approach covered in What Is CPE (Cost Per Engagement) and What Is CPV (Cost Per View) for their respective metrics.

Frequently asked questions

Is CPM relevant for conversion-focused campaigns, or only awareness campaigns?

It's primarily an awareness-stage metric. CPM tells you how cheaply you're getting seen, not whether that visibility converted into anything.

Does a lower CPM always mean a better deal?

Not necessarily — a very low CPM can sometimes reflect a less-targeted or lower-quality audience rather than genuine efficiency. Weigh CPM alongside audience relevance and engagement rate (see What Is Engagement Rate (ER)), not as a standalone decision factor.

The bottom line

CPM is the foundational reach-pricing metric that connects influencer marketing to the broader advertising industry's cost language — useful for awareness-stage comparisons and as the mechanism underlying EMV calculations, but not a stand-in for engagement or conversion metrics once a campaign's goal moves past pure reach.