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Book a call →Cost Per Mille (CPM) explained in plain English: the formula, worked examples and what to change when the number is off.
CPM (cost per mille) is the price of 1,000 ad impressions. 'Mille' is Latin for thousand. The CPM formula is ad spend ÷ impressions × 1,000: spending $250 for 50,000 impressions is a $5 CPM. CPM shows how expensive it is to reach your audience, before clicks or sales are counted.
CPM = ad spend ÷ impressions × 1,0005,000+ B2B brands. Coaches, agencies, and service providers turning video into a growth engine.
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Divide what you spent by the number of impressions, then multiply by 1,000. The result is what 1,000 impressions cost you. You can rearrange the formula to find any one of the three values from the other two.
CPM = $250 ÷ 50,000 × 1,000 = $5.00 Impressions = $250 ÷ $5.00 × 1,000 = 50,000 Spend = $5.00 × 50,000 ÷ 1,000 = $250
With spend in B2 and impressions in C2, enter =B2/C2*1000 and format it as currency. Use =IFERROR(B2/C2*1000,0) to hide errors on empty rows. To plan a budget from a target CPM in D2 and target reach in E2: =D2*E2/1000.
For a total across campaigns, use =SUM(B:B)/SUM(C:C)*1000. Averaging the CPM column gives a small test campaign the same weight as your biggest one.
| Driver | Effect on CPM | What to do |
|---|---|---|
| Season (Q4, sales events) | More advertisers bid for the same people, so CPM rises | Plan budgets and creative before peak weeks |
| Narrow audience | Fewer people to show ads to, so each impression costs more | Test broader targeting and let the creative find buyers |
| Ad quality and engagement | Platforms favour ads people engage with | Stronger hooks and native-looking video |
| Ad fatigue | Falling engagement at high frequency raises cost | Rotate in new hooks and angles |
| Placement | Feeds, stories and in-stream are priced differently | Compare CPM by placement, not just by campaign |
CPM is the cost of reach, CPC the cost of a click and CPA the cost of a result. They are linked: CPC = CPM ÷ (CTR × 1,000), and CPA = CPC ÷ conversion rate. A low CPM is only good news if those impressions turn into clicks and sales.
CPM $10, CTR 1.25% → CPC = 10 ÷ 12.5 = $0.80 Conversion rate 2% → CPA = $0.80 ÷ 0.02 = $40
CPM is what you pay per 1,000 impressions as an advertiser. eCPM (effective CPM) is used mostly by publishers and app developers: revenue earned per 1,000 impressions, whatever the pricing model. The formula has the same shape: earnings ÷ impressions × 1,000.
Meta calculates winning ads using: Total Value = Bid × Estimated Action Rate + User Value. High-quality UGC ads maximize the 'User Value' component, allowing you to win premium auction real estate at lower CPMs than competitors bidding higher.
Seven Figure Studio produces high-converting UGC video ads, VSLs, and static creative engineered specifically around direct-response metrics. Packs start at $35 with 24 to 48 hour delivery.
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We review your offer and ad account before the call, then recommend the right package, the first angles to test for Cost Per Mille (CPM), and a delivery timeline. No pitch deck.