Worked examples
Broad social prospecting
| Ad spend | $400.00 |
| Impressions | 50000 |
| CPM | $8.00 |
| Impressions per $10 | 1250 |
An $8 CPM — typical for broad US audiences on Meta in 2026.
Narrow retargeting audience
| Ad spend | $150.00 |
| Impressions | 6000 |
| CPM | $25.00 |
| Impressions per $10 | 400 |
A $25 CPM — small, high-intent audiences cost more per impression and usually earn it.
Frequently asked questions
What is a normal CPM in 2026?
US e-commerce advertisers commonly see $6–$15 CPMs on Meta broad prospecting, $15–$40 on retargeting and narrow interest stacks, $3–$10 on TikTok, and $20–$50 for YouTube in-stream. Q4 inflates everything 30–80%. Treat these as orientation, not benchmarks — your creative and audience quality move CPM more than the platform average does.
Why does CPM matter if I pay per click?
Because on auction platforms the underlying commodity is the impression. Your effective CPC is CPM ÷ clicks per 1,000 impressions, so a $10 CPM with a 1% CTR yields a $1 CPC. Strong creative that doubles CTR halves your click cost without touching bids — which is why creative testing usually beats bid tinkering.
Why did my CPM suddenly increase?
The usual suspects: seasonal auction pressure (Q4, sales events), audience fatigue forcing the platform to pay for harder-to-reach users, a narrowed audience, frequency caps filling up, or a drop in ad relevance ranking. Compare CPM alongside frequency and CTR — rising CPM with rising frequency and falling CTR is the classic fatigue signature.
Is a high CPM bad?
Not by itself. Retargeting audiences carry CPMs several times prospecting rates and still deliver the cheapest conversions in the account, because intent is concentrated. CPM is an input price; judge it by the output — cost per acquisition and ROAS. A $40 CPM producing $15 CPAs beats an $8 CPM producing $50 CPAs every day.
Related calculators
Part of the Advertising & ROAS collection.