Roll Counts
How Many Rolls of Wallpaper Do I Need?
Updated: Aug 2026
The standard rule of thumb — one roll covers around 5m² of wall — is a fine starting point and a poor final answer, because it assumes a flat rectangular wall with no windows, no pattern, and no waste from trimming. Real rooms have all three. Here's what the rule of thumb gets you, room by room, and what actually moves the number from there. The sections below cover the measuring mistakes and edge cases that most often throw the number off, plus a worked example.
Open the Wallpaper PlannerThe rule of thumb: one roll per ~5m² of wall
A standard roll is 53cm wide and 10m long, giving roughly 5m² of coverage before any waste — divide your total wall area by 5 and round up for a rough starting figure. It's a useful sanity check on a quote, but treat it as a floor, not a final number.
Typical roll counts by room
As a rough range: a bathroom or small home office usually needs only a few rolls; a bedroom or dining room somewhat more; a living room more again depending on its size and how many walls are papered; and a hallway, despite being narrow, often needs more than its floor area suggests because it's long and wraps around several corners.
What pushes the count above the rule of thumb
A patterned roll with a large repeat wastes extra length matching the design across strips, a ceiling higher than the standard height fits fewer strips per roll, and a wall's doors and windows only reduce the count if they're large enough to skip a full strip — a narrow window often still costs a whole strip either side of it.
Rolls only come in whole numbers
However the maths works out, you can't buy a fraction of a roll — always round the final figure up, and round the strip count per wall up too before dividing into rolls, since a wall needing four and a half strips still needs the material for five.
Get your exact roll count
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Try the wallpaper calculator →Order one extra for the buffer, not for the shortfall
A single additional roll on top of the calculated count is standard practice, and it's there to cover a miscut or a strip that doesn't match the pattern quite right — not a hedge against the estimate itself being wrong. If the base number is right, that buffer roll should be the only one left over at the end.
Common measuring mistakes that inflate or shrink the count
The most common mistake is measuring wall height to the skirting board instead of the floor, which shorts the strip length by a few centimetres and shows up as a shortfall partway through a wall. The second is measuring width at one height only; walls are rarely perfectly square, so measure at the top and bottom and use the larger figure. The third is skipping a window or door because it looks small in person - anything under roughly a metre wide still usually costs a full strip either side of it, since the offcuts are too narrow to reuse.
A worked example: a 4m wall with one window
Take a wall 4m wide and 2.4m high with a 1m window. At 53cm roll width, that's roughly 7-8 strips to cover the width, minus at most one strip skipped for the window - call it 7 strips needed. A standard 10m roll cuts into 4 strips at 2.4m each with minimal waste, so 7 strips needs 2 rolls before pattern matching. Add a large repeat and that same wall can easily need a third roll, since each strip gets trimmed to the next full repeat length rather than cut at exactly 2.4m.
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See plans & pricingCommon questions
How many rolls do I need for just one feature wall?
Usually just a handful, depending on the wall's width and the roll's coverage — a single wall almost always needs far fewer rolls than papering the whole room, which is why a feature wall is the common way to try a higher-price paper.
Do bay windows or alcoves need extra rolls beyond the basic room count?
Yes — each one adds its own small strips and return walls that a flat room-area total doesn't account for, so treat them as their own measurement rather than folding them into the room's rule-of-thumb figure.
What if I run one roll short partway through the job?
Reorder the same product code and dye lot as soon as possible, since later batches can shade slightly differently — this is exactly what the one-roll buffer is meant to prevent, so order it upfront rather than mid-job.
Is the rule of thumb ever accurate enough to just buy from?
For a simple rectangular room with a plain paper and no big pattern, it's usually close. Add a patterned repeat, a sloped wall, or several windows and doors, and the gap between the rule of thumb and the real count grows enough that it's worth calculating exactly instead.
Should I order extra for a room with a lot of corners?
Yes - each internal or external corner rarely lines up with a full strip width, so you lose a little material to trimming at every one. A room with more corners than a simple rectangle needs a slightly larger buffer than the standard one extra roll.
When is it worth paying a decorator to work out the roll count instead of doing it yourself?
Once the room has a sloped ceiling, a bay window, or a large-repeat pattern on more than one wall, the maths gets error-prone enough that a decorator's estimate is often worth it - the price of one wrong roll order can exceed what they'd charge to get it right the first time.
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Get your exact roll count
Draw your walls — including sloped sections, alcoves, and single feature walls — and get a free estimate before you buy.
Open the Wallpaper PlannerPlanning a specific room? See how much wallpaper you need →
Quoting this as a job, not a DIY project? Try the contractor estimator →
Want the exact count for your own room instead of a rule of thumb? Try the wallpaper calculator →
Papering a small bathroom with a lot of fixtures to work around? Bathroom wallpaper calculator →
Dealing with a patterned paper? Wallpaper pattern repeat calculation →
Budgeting the full job? Wallpaper cost calculator →
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