Google Display CPM Calculator
The Google Display Network is where the gap between served and seen is widest. Display impressions are cheap — and a large share of them are never on screen long enough to matter. The industry's measurement bar (the MRC standard, which Google's Active View follows) counts a display impression as viewable when at least 50% of its pixels stay in view for at least one continuous second — and large ads over 242,500 pixels get a relaxed 30% threshold. Run your numbers with a viewable share and the calculator shows what the attention really cost.
A $500 campaign at a $2.50 served CPM buying 200,000 impressions is, at 60% viewability, really a $4.17 vCPM campaign. That second number is the one media buyers should negotiate against — and it is the one this tool puts next to the invoice figure.
Unlocks frequency — how often each person saw the ad.
CPM — cost per 1,000 impressions
$2.50
Each individual impression costs $0.00.
- vCPM — per 1,000 viewable impressions
- $4.17
Only 120,000 impressions met the viewable standard. This is what the attention actually cost.
The viewable standard counts an impression when at least 50% of its pixels stay on screen — 1 continuous second for display, 2 for video. Measured against that bar, your real CPM is almost always higher than the served CPM platforms report.
Starting values are set for a typical google display scenario — change any field to match yours. Need the plain version? CPM Calculator.
Served CPM vs viewable CPM, worked
| Figure | Value | Basis |
|---|---|---|
| Served CPM | $2.50 | Cost per 1,000 impressions delivered |
| Viewable impressions | 120,000 | 60% meeting the 50%-pixels-for-1-second bar |
| Viewable CPM | $4.17 | Cost per 1,000 impressions actually seen |
How Display CPMs are actually priced
- GDN inventory auctions across millions of sites; the same targeting can serve $0.50 CPMs on obscure blogs and $10+ on premium publishers. Placement reports tell you which side your money went to.
- Topic, audience and demographic layers each narrow the auction — every layer raises the expected CPM and (usually) the attention per impression.
- Remarketing lists price above cold audiences because the people are worth more — a higher CPM that is usually worth paying.
- Site categories with historically poor viewability (below-the-fold heavy layouts) show served CPMs that flatter them; the vCPM figure is the honest comparison.
Levers that move Display CPM
- Switching bidding from CPC to vCPM re-anchors the auction on seen impressions — expect the reported CPM to rise while wasted spend falls.
- Exclusions are free CPM reduction: blocking low-viewability placements and mobile app categories typically improves the viewable share more than the served CPM.
- Ad size matters mechanically — the 242,500-pixel relaxed threshold (30% of pixels) exists for large formats; half-page and leaderboard units measure differently than 300×250 boxes.
- Frequency capping per user is set at the campaign level on GDN; without it, cheap inventory can mean the same user twelve times.
Frequently asked questions
- What is viewable CPM (vCPM)?
- Cost per 1,000 impressions that met the viewability standard — at least 50% of the ad's pixels visible for one continuous second for display (two seconds for video), measured by Google's Active View. It is the honest price of attention; served CPM is the price of delivery.
- Why is my viewable CPM so much higher than my served CPM?
- Because a share of served impressions never met the standard. At 60% viewability, vCPM is served CPM divided by 0.6 — a $2.50 served CPM is really $4.17 per seen thousand. The wider the gap, the more of your budget bought placements nobody had on screen.
- Should I bid with vCPM on the Display Network?
- If the goal is awareness with a quality bar, yes — vCPM bidding pays only for impressions meeting the viewable standard, which automatically deprioritizes junk inventory. For click-driven goals, CPC or conversion bidding usually fits better; judge by cost per click and cost per conversion.
- What is a typical Google Display CPM?
- Wide by design — display spans from well under $1 on long-tail sites to double digits on premium placements, moving with targeting layers and season. Benchmark your own account trend rather than a universal figure, and always compare at the viewability-adjusted level.
- Does the 1-second rule really define 'seen'?
- It defines the measurable minimum — the MRC standard Google follows — not attention. It is best understood as 'had the opportunity to be seen'. That is exactly why vCPM is a floor for judging cost, and why creative and placement still decide whether the opportunity was used.
- How does frequency fit into Display planning?
- Enter reach in the calculator and frequency tells you how hard you are hammering the same people. Display frequency caps are essential because cheap inventory tempts delivery systems toward repetition; a frequency of 3-5 per month per person is a common planning assumption for cold display audiences.