Short rolls change the count
A self-adhesive roll is a fraction of the length of a pasted one: Tempaper’s are 20.5 in wide and 16.5 ft long, roughly 28 sq ft, against 33 ft for an American bolt and 10.05 m for a European roll. Square feet don’t decide how many you buy; complete panels do. On a normal 8 ft wall that is usually one panel per roll, so the number of rolls equals the number of panels across.
The wallpaper calculator is set here to a single 10 × 8 ft wall in Tempaper’s Cherry Bomb, listed with an 18 in straight repeat. Each panel is 100 in with overlap, raised to a whole number of repeats, 108 in. One fits per roll, the wall needs six, and the paste line stays off because the paper sticks by itself.
Getting a second panel out of a roll
The chart below shows how close this is: without a motif to align, two 8 ft panels need 200 in and the roll holds 198. If your ceiling is an inch or two lower, measure it and enter it, and if you’ll overlap by less than 4 in, change the trim. The working under the result tells you how many panels each roll yields, so you’ll see when it tips to two. With a window in the wall, the panels over the glass are shorter and often fit the spare lengths.
Tempaper rolls for one wall
Tempaper's 20.5 in × 16.5 ft roll, 4 in trim a drop, on walls with no door or window: with Cherry Bomb's 18 in straight repeat, and with a pattern that needs no match.
| Wall | Drops | 18 in repeat | No match |
|---|---|---|---|
| 6 × 8 ft | 4 | 1/roll · 4 rolls | 1/roll · 4 rolls |
| 8 × 8 ft | 5 | 1/roll · 5 rolls | 1/roll · 5 rolls |
| 10 × 8 ft | 6 | 1/roll · 6 rolls | 1/roll · 6 rolls |
| 12 × 8 ft | 8 | 1/roll · 8 rolls | 1/roll · 8 rolls |
| 10 × 9 ft | 6 | 1/roll · 6 rolls | 1/roll · 6 rolls |
| 12 × 9 ft | 8 | 1/roll · 8 rolls | 1/roll · 8 rolls |
Tempaper, Cherry Bomb: "20.5 in. x 16.5 ft. = 28.18 sq. ft.", straight match, 18 in repeat, checked September 2026.
Tempaper papers in the calculator
A 12 × 12 ft room with 8 ft walls, one 32 × 80 in door and one 3 × 4 ft window, 4 in trim a drop, each paper on its own roll. The first one is what the calculator above starts with.
| Paper | Roll | Drop | Drops a roll | Rolls | Area method |
|---|---|---|---|---|---|
| Cherry BombMatch Type: Straight, Vertical Pattern Repeat: 18 in. | 20.5 in × 16.5 ft | 9 ft | 1 | 29 | 13 |
Roll sizes, repeats and matches as Tempaper states them on the pages linked above, checked September 2026. Tempaper and its product names are its owner's trademarks, used only to describe the products; Meadow Tools is not affiliated with or endorsed by Tempaper.