Enter the daily traffic count, the rate, the run length and your production cost. You get total spend, total impressions, media CPM and the all-in CPM including production.
Outdoor is quoted in weekly or four-weekly rates per face, which makes it hard to compare against anything else you buy. Converting to CPM puts it on the same axis as every other channel, and that is the only way to judge whether the number you were quoted is sensible.
Daily effective circulation. The traffic count for the site, adjusted for how many of those people could plausibly see the board. It is an estimate produced by the vendor or an audience measurement body, not a count of eyeballs. Two boards on the same road can carry very different figures depending on approach angle, speed limit and how many other boards compete for the same glance.
The media rate. Usually quoted per face for a four-week period. It is negotiable, particularly on unsold inventory close to the date, and particularly outside the fourth quarter.
Production and installation. Printing the vinyl and hanging it. A one-off, typically several hundred to a couple of thousand depending on size. Because it does not repeat, it is the reason a twelve-week run has a materially lower all-in CPM than a four-week one.
What is not in the quote. Design work, and in some markets an illumination surcharge. Ask which of these is included before comparing two proposals, because vendors differ.
| Format and market | Typical four-week media rate | Usual CPM band |
|---|---|---|
| Static bulletin, rural highway | $700 to $1,500 | $2 to $4 |
| Static bulletin, mid-size metro | $1,800 to $5,000 | $3 to $6 |
| Static bulletin, major metro | $5,000 to $20,000 | $4 to $9 |
| Digital face, rotating | $2,000 to $12,000 | $6 to $12 |
| Premium landmark site | $25,000 upwards | Priced on fame, not CPM |
The spread is wide because you are buying a specific piece of physical geography, and no two are substitutes. A board on the approach to an airport and a board two miles further out are not the same product even with similar traffic counts.
Digital faces look worse on CPM because the count is divided by the share of the loop you occupy. An eight-slot loop gives you one eighth of the dwell time, and the CPM should reflect that. If a digital quote shows the same CPM as a static one on the same road, ask how the loop was counted.
The worked example costs $5,150 all in and delivers 1,176,000 impressions, a CPM of $4.38. On a pure CPM basis that beats most paid social and nearly all video.
It is also the weakest impression on the chart. A billboard impression is a passing glance by someone in a moving vehicle, with no click, no targeting beyond geography, and no way to know who saw it. A feed impression is at least attributable and can be retargeted. They are priced differently because they are worth different amounts, and comparing them on CPM alone is comparing the price without the product.
Where outdoor genuinely competes is local saturation. If your customers are all within a few miles and the same board is passed daily by the same people, frequency accumulates at a cost per exposure that digital struggles to match. Use the CPV calculator if you are trying to size that effect, and the CPM calculator to line the quote up against your other channels.
What you cannot do is hold it to a ROAS target. There is no attribution path. Judge outdoor on whether overall demand moved in the geography during the flight, with a control area if you can arrange one, and accept that the measurement will be coarse.
Billboard CPM is low. The impression is also the weakest one you can buy. Both things are true.
The first trap is trusting the circulation figure without asking how it was produced. It is a modelled estimate, and the vendor selling the space is often the party producing it. Ask for the methodology and whether it is independently audited. A board whose count assumes both directions of travel when only one can see the face is overstating by roughly half.
The second is forgetting the one-off. Production makes a short flight expensive per impression. In the example it is 18.5 percent of total cost on a four-week run. Extend the same creative to twelve weeks and production drops to under 7 percent, which lowers the all-in CPM by more than a dollar without renegotiating anything.
The third is buying one board. Outdoor works on repetition within a geography, and a single face reaches the people who use that one road. If the budget only covers one, it is usually better spent elsewhere.
The last is signing a long term without a creative plan. The same message for six months stops being seen by exactly the people who pass it most, which are the people you were buying.
Anywhere from a few hundred dollars on a rural highway to tens of thousands on a landmark city site. The rate is set by the specific location rather than by any standard price, which is why converting the quote to CPM is the only reliable way to judge it.
A modelled estimate of how many people pass the site each day and could plausibly see the face, adjusted from raw traffic counts. It is an estimate, frequently produced by the vendor, so ask how it was calculated and whether it is independently audited.
Not usually on CPM, because you occupy only one slot of a rotating loop and your share of the dwell time falls accordingly. They are better for flexibility, since creative can change by daypart without reprinting anything.
No. There is no attribution path from a passing glance to a sale. Judge outdoor on whether demand moved across the geography during the flight, ideally against a control area, and accept that the measurement is coarse.