Ceiling Wallpaper Calculator
A ceiling is a plane, not a wall, so this sheet takes two spans. Choose which way the strips run and the roll redraws, because direction changes the count.
Sheet 6 of 9
Two spans, not a width and a height. Which way the strips run changes the count, and the cheaper direction is not the one most people guess.
Strip direction changes the count. Waste starts higher here because overhead work spoils more.
Order
6rolls
5 drops × 1.15 waste = 6 → ÷ 1 per roll = 6.00 → 6 rolls
- Strips across the ceiling
- 5
- Strips per roll
- 1
- Cut length per strip
- 14 ft
- Ceiling area
- 120 sq ft
- Left on the last roll
- 78 ft
- Area ÷ coverage check
- 3 rolls
The ceiling, in strips
Why ceiling math is different
On a wall, one dimension is fixed by the room: the height. Every drop is that long, and the only question is how many of them fit across the width. On a ceiling neither span is fixed, so you choose which one the strips run along, and that choice changes both the cut length and the number of strips.
The obvious guess is that fewer, longer strips waste less. That is often wrong, and the chart below shows why. What decides the roll count is how many whole cuts fit in one roll, and a longer cut can drop that yield from two to one, throwing away nearly half of every roll. On a 10 × 12 ft ceiling, running the strips the 12 ft way needs six rolls and running them the 10 ft way needs four, for the same ceiling and the same paper. On a 12 × 14 ft ceiling the answer reverses. Check both.
Paper is not the only consideration. Shorter strips are easier to handle overhead, which matters when you are the one holding a pasted length above your head, and decorators often run strips towards the main window so the seams catch less daylight. The sheet gives you the quantity for either choice.
Everything else is the same strip method as the wall calculator, including the pattern rounding. Since ceiling strips tend to be longer than wall drops, a large repeat is more expensive here than it is on a wall.
How the ceiling sheet works
Measure the ceiling as a rectangle
Length and width at the widest points. For an L-shaped room, split it into rectangles and add the strip counts.
Try both strip directions
Neither is reliably cheaper. Switch the toggle and compare: the sheet reports what the other direction would cost, and the difference can be two rolls on the same ceiling.
Raise the waste allowance
Ceilings are harder to hang than walls. 15–20% is normal, and a first attempt deserves the higher end.
Note the fixtures
A light fitting or a smoke alarm is cut around, not deducted. The paper still has to run past it, so the strip count does not change.
Both directions, side by side
| Ceiling | Strips the long way | Rolls | Strips the short way | Rolls | Cheaper |
|---|---|---|---|---|---|
| 8 × 10 ft | 4 × 10 ft 6 in | 3 | 5 × 8 ft 9 in | 2 | short |
| 10 × 10 ft | 5 × 10 ft 6 in | 3 | 5 × 10 ft 6 in | 3 | either |
| 10 × 12 ft | 5 × 14 ft | 6 | 6 × 10 ft 6 in | 4 | short |
| 12 × 12 ft | 6 × 14 ft | 7 | 6 × 14 ft | 7 | either |
| 12 × 14 ft | 6 × 15 ft 9 in | 7 | 7 × 14 ft | 9 | long |
| 14 × 16 ft | 7 × 17 ft 6 in | 9 | 8 × 15 ft 9 in | 10 | long |
Fewer, longer strips sound more efficient and often are not. What decides it is how many whole cuts fit in a 27 ft roll: at a 14 ft cut only one does, and nearly half of every roll becomes offcut. Switch the direction on the ticket to see both numbers for your own ceiling.
Other sheets
- 1Wallpaper CalculatorMulti-wall strip method
- 2Accent Wall CalculatorSingle-wall strip method
- 7European Wallpaper Roll CalculatorMetric strip method
- 8Wall Panel CalculatorPanel grid with gaps
Nothing on this site is for sale.
Questions people ask
How much wallpaper do I need for a ceiling?
Measure the ceiling as a rectangle: length and width. Divide the span the strips run across by the roll width and round up for the number of strips. The cut length is the other span plus trim, rounded up to the pattern repeat. Then drops per roll and rolls, exactly as on a wall. A 10 × 12 ft ceiling papered with a 27 in × 27 ft roll takes 6 strips.
How much does it cost to wallpaper a ceiling?
This site does not quote prices. What it gives you is the quantity, which is the figure a decorator needs before quoting. Ceilings usually cost more to hang than walls because the work is overhead and slower, not because they need more paper.
How does a ceiling wallpaper calculator work?
Exactly like a wall calculator with the plane rotated. Instead of wall width and wall height, it takes the two ceiling spans, and you choose which way the strips run. Running them the long way gives fewer, longer strips; the short way gives more, shorter ones. The roll drawing shows the difference immediately.
What measurements do I need for ceiling wallpaper?
The length and width of the ceiling, and the roll width, roll length, and vertical repeat from the label. If the room is not a plain rectangle, split it into rectangles and add the strips from each.
How do I account for pattern repeat in ceiling wallpaper?
The same way as on a wall: the cut length is rounded up to a whole number of repeats so adjacent strips line up. Because ceiling strips are usually longer than wall drops, a large repeat costs more here. The pattern repeat guide has the detail.
What waste allowance should I use for a ceiling?
Higher than a wall. 15–20% is the usual advice, because hanging overhead is harder, paper is more likely to crease or tear while it is being positioned, and most people spoil at least one strip. The ticket above starts at 15%. The waste guide covers when to go higher.
How many rolls of wallpaper for a 12x12 ceiling?
With a 27 in × 27 ft roll, a 21 in straight repeat and 15% waste: 6 strips, each cut to 14 ft once the repeat is rounded up, and only one whole strip fits on a 27 ft roll. That is 7 rolls, and nearly half of each roll is offcut. A square ceiling gives the same answer whichever way the strips run. Dropping the repeat, or using a longer roll, changes it far more than the direction does.