Marketing
CPM Calculator
Cost per thousand impressions — the standard unit of ad pricing. Enter any two of cost, impressions, and CPM to get the third, live, with the working shown and a platform benchmark.
Solve for
Ad spend / budget
$
Times the ad is shown
= 200K impressions
CPM
$2.50
$2.50 CPM · Below typical range
The working
CPM = (cost ÷ impressions) × 1,000
= ($500.00 ÷ 200,000) × 1,000
= $2.50
Cost / impression
$0.0025
Impr / $1
400
Effective CPM
$2.50
Try an example
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The basics
What is CPM?
CPM — cost per mille, Latin for cost per thousand — is the price of showing an ad one thousand times. It is the dominant currency of awareness advertising: every display, video, and social platform quotes it, because pricing per thousand impressions lets a small test and a national campaign be compared on the same scale.
CPM = (cost ÷ impressions) × 1,000
What it measures
The cost to reach a thousand sets of eyes. An impression is one serving of the ad, so CPM is the price of reach — not of clicks, and not of sales.
$500 ÷ 200,000 × 1,000 = $2.50
mille = 1,000
Why per thousand
Single impressions are fractions of a cent, awkward to quote. Bundling them into thousands gives a clean, comparable number — the same reason fuel is priced per gallon, not per drop.
2,000,000 impressions = 2,000 mille
Method
How to calculate CPM by hand
Two steps from spend and impressions to a cost per thousand.
- 1
Divide cost by impressions
Take the total cost of the campaign and divide it by the number of impressions. This is the cost of a single impression.
$500 ÷ 200,000 = $0.0025 - 2
Multiply by 1,000
Scale that per-impression cost up to a thousand impressions — the standard unit ad platforms quote.
$0.0025 × 1,000 = $2.50 CPM - 3
Rearrange to solve the others
Know the CPM instead? The same relationship gives cost and impressions: cost is CPM over a thousand times impressions, and impressions is cost over CPM times a thousand.
Cost = (CPM ÷ 1,000) × impressions
Worked examples
See it solve all three ways
The same formula, rearranged. Switch tabs to find CPM, the total cost, or the impressions a budget buys — each one computed from the values shown.
Given Spend $750.00 for 300,000 impressions
CPM = (cost ÷ impressions) × 1,000
= ($750.00 ÷ 300,000) × 1,000
CPM = $2.50
Where it shows up
Where CPM is used
CPM is the default pricing model anywhere reach is the product rather than the click.
Reach goals
Brand awareness
When the aim is to be seen — a launch, a rebrand, top-of-funnel — advertisers buy on CPM because impressions, not clicks, are the goal.
Video & display
Programmatic buying
Open ad exchanges auction inventory by the thousand impressions in real time, so CPM is the unit every bid is measured in.
eCPM
Publisher revenue
On the other side, publishers normalise all their earnings — clicks, deals, fixed sponsorships — back to an effective CPM to compare how well each placement monetises.
Reference
Average CPM by platform
Typical CPM ranges across the major ad platforms, in USD. Use them to sanity-check a quote or set an expectation — actual rates swing with niche, targeting, format, and season.
| Platform | Typical CPM | Notes |
|---|---|---|
| $5.00 – $12.00 | Broad reach, mature auction | |
| $6.00 – $14.00 | Feed + Stories + Reels | |
| TikTok | $6.00 – $10.00 | Young audience, cheap reach |
| YouTube | $9.00 – $20.00 | Skippable in-stream video |
| Google Display | $2.00 – $5.00 | Cheapest broad reach |
| X (Twitter) | $5.00 – $9.00 | Conversation-driven |
| $25.00 – $45.00 | Premium B2B targeting | |
| Snapchat | $3.00 – $8.00 | AR + vertical video |
| $4.00 – $9.00 | Intent-led discovery | |
| Programmatic display | $1.00 – $4.00 | Open-exchange inventory |
Figures are widely-cited industry midpoints for 2024–25, not guarantees. Treat them as a starting reference, then measure your own accounts.
Quick chart
How far does my budget go?
Enter a budget to see the reach it buys at each CPM, then use the grid for common spend-and-rate combinations at a glance.
$
$2.00 CPM
375K
$5.00 CPM
150K
$8.00 CPM
93.75K
$12.00 CPM
62.5K
$20.00 CPM
37.5K
$35.00 CPM
21.43K
| Budget ↓ / CPM → | $2.00 | $5.00 | $8.00 | $12.00 | $20.00 | $35.00 |
|---|---|---|---|---|---|---|
| $100.00 | 50K | 20K | 12.5K | 8.33K | 5K | 2.86K |
| $500.00 | 250K | 100K | 62.5K | 41.67K | 25K | 14.29K |
| $1,000.00 | 500K | 200K | 125K | 83.33K | 50K | 28.57K |
| $2,500.00 | 1.25M | 500K | 312.5K | 208.33K | 125K | 71.43K |
| $5,000.00 | 2.5M | 1M | 625K | 416.67K | 250K | 142.86K |
| $10,000.00 | 5M | 2M | 1.25M | 833.33K | 500K | 285.71K |
Read down to your budget and across to the CPM you expect — the cell is the impressions that spend buys. Lower CPM, more reach for the same money.
Worth knowing
CPM and the metrics around it
CPM is one link in a chain. These related rates turn raw impressions into the outcomes you actually care about.
eCPM = (revenue ÷ impressions) × 1,000
eCPM
The publisher's mirror of CPM — every dollar earned, normalised back to a thousand impressions, so different deals can be ranked.
CPC = cost ÷ clicks
CPC (cost per click)
What you pay per click rather than per view. CPM and CTR together imply your CPC; a cheap CPM with a weak click-through can still cost more per click.
CTR = clicks ÷ impressions
CTR (click-through rate)
The share of impressions that become clicks. It is the bridge that turns reach bought on CPM into the traffic a performance campaign needs.
CPA = cost ÷ conversions
CPA (cost per acquisition)
The bottom line — what each conversion costs. CPM feeds it, but only once CTR and conversion rate have done their work.
CPM ↔ vCPM
Viewable CPM
Some platforms charge only for impressions that were actually on screen. A viewable CPM (vCPM) is higher than a served CPM for the same money, because you pay for fewer, better impressions.
Reach × frequency
Frequency
Impressions are not unique people. Total impressions divided by reach is frequency — how many times the average person saw the ad — which quietly shapes effective cost.
Pitfalls
Common CPM mistakes
The errors that make a CPM number lie to you.
÷ 1,000, not ÷ 100
Forgetting the thousand
CPM is per thousand impressions, so the multiply-by-1,000 step is essential. Skip it and your figure is off by three orders of magnitude.
impressions ≠ reach
Confusing impressions with people
One person seeing an ad five times is five impressions but a reach of one. Judging audience size by impressions overstates how many people you actually touched.
low CPM ≠ good buy
Chasing the lowest CPM
Cheap reach to the wrong audience is wasted money. A higher CPM that converts beats a bargain that never clicks — always read CPM beside CTR and conversion rate.
served vs viewable
Ignoring viewability
A served impression may never appear on screen. Comparing a served CPM to a viewable CPM is comparing two different things and will mislead the buy.
FAQ
Common questions
CPM stands for cost per mille — the cost of one thousand ad impressions (mille is Latin for thousand). It is the standard way display, video, and social ads are priced, because it normalises cost to a fixed unit of reach so campaigns of any size compare directly.
Divide the total amount spent by the number of impressions, then multiply by 1,000: CPM = (cost ÷ impressions) × 1,000. Spending $500 to earn 200,000 impressions is a $2.50 CPM.
It depends entirely on platform and audience. Broad social feeds often run $5–$14, cheap programmatic display can be $1–$4, and narrow B2B targeting on LinkedIn can exceed $30. A lower CPM is cheaper reach, but it only matters if those impressions convert — judge CPM next to click-through and conversion rate, never alone.
Rearrange the same formula. Total cost = (CPM ÷ 1,000) × impressions. Impressions = (cost ÷ CPM) × 1,000. The calculator above does all three directions — pick what you want to solve for and enter the other two.
CPM charges per thousand impressions (views of the ad), while CPC charges per click. CPM suits awareness campaigns where reach matters; CPC suits performance campaigns where you only pay when someone engages.
CPM is what an advertiser pays to show an ad a thousand times. eCPM (effective CPM) is the publisher's view: total revenue earned per thousand impressions, regardless of how it was actually priced (clicks, conversions, flat fees). Both use the same per-thousand math, just from opposite sides of the transaction.
No. CPM only counts impressions — the ad being served. It says nothing about whether anyone clicked or bought. To connect CPM to outcomes you combine it with click-through rate (CTR) and conversion rate, which together give cost per click and cost per acquisition.
High CPM usually means high competition for your audience: narrow targeting, premium placements, a saturated niche, or a peak season like Q4 retail. Smaller audiences and exclusive inventory cost more per impression because more advertisers bid for the same eyeballs.
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Ugo CharlesBuilt and fact-checked against our editorial standards · Last updated June 2026
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