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Enter the wall size and the roll coverage to get the roll count, with waste for pattern matching.
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LocalServiceHQ · Wallpaper calculator
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Estimates, not quotes. Check product packaging for exact coverage before ordering.
Divide the wall area by the usable square feet in one roll, then add waste. Single rolls usually cover about 56 sq ft, but pattern repeats, doorways and windows reduce usable coverage, so 15 percent waste is common and 20 percent is safer for large repeats.
A 12 ft wide wall that is 8 ft high is 96 sq ft. At 56 sq ft per roll, that is 1.71 rolls; with 15 percent waste it is 1.97, so buy 2 rolls. A pattern with a large repeat or a wall with several openings may need 3.
Wallpaper with a pattern repeat needs extra material because each strip is matched to the next. The repeat size is printed on the roll; the larger the repeat, the more waste. Walls also need prep: clean, smooth and primed, or the seams will show and the paper will fail early.
Vinyl wallpaper is wipeable and suits kitchens and hallways. Non-woven paper is easy to hang and strips dry, which makes it a good choice for beginners. Traditional paper looks best but is harder to hang and less forgiving in humid rooms.
Pattern type changes the waste: a small repeat needs less matching than a large floral or damask, and a drop match uses more paper than a straight match.
| Room | Wall area | Rolls at 56 sq ft (15% waste) |
|---|---|---|
| Bedroom feature wall | 96 sq ft | 2 |
| Hallway | 160 sq ft | 4 |
| Living room | 320 sq ft | 7 |
| Nursery | 240 sq ft | 5 |
Subtract large doors and windows, but leave the offcuts in the count; small areas around openings rarely use a full strip.
Walls need to be clean, dry and smooth. Prime bare plaster and new drywall so the paper releases evenly and the seams do not show. Paste-the-wall products are easier for beginners because the paper does not soak and stretch.
A smoothing brush and a seam roller are the two tools that decide whether the finish looks professional. Book the job for a dry day and keep the room ventilated.
Cut strips to the repeat length plus a little extra, then match the pattern before pasting. Seams should be butted, not overlapped, and placed away from the main sight line where possible.
Dark colours and large patterns show every seam. A lining paper underneath evens out the wall and makes the finished job look flatter.
One feature wall is a manageable DIY job with non-woven paper. A whole room with a large repeat, stairwells and high walls are better with a decorator. Ask how many rolls they price and whether wall prep is included.
Compare quotes on the same wallpaper and the same prep scope, not on the roll count alone.
Score the paper, apply warm water or a stripping solution, and let it soak before pulling. Steamers speed up the job on stubborn paper. Dry-strippable non-woven paper usually peels away without soaking.
Wash the wall after stripping to remove paste residue. Any paste left behind will stop the new paper from bonding and can show through as a stain.
Bubbles come from trapped air or too much paste; smooth them out with a brush while the paper is wet. Lifting seams mean too little paste or a cold room. Shiny patches are usually burnished by over-working the paper.
Dark colours and large patterns show every flaw, so prep and lighting matter more than the paper price. Hang the first strip in a corner, not the middle of a feature wall.
A feature wall uses one wall area, so calculate that wall alone rather than the room perimeter. Half walls and panelling need the height of the papered area, not the full ceiling height.
Order one extra roll for a feature wall. The pattern has to line up at both edges, and a small error at the top can waste most of a strip.
Ready-mixed paste is convenient for small jobs; powder paste is cheaper for a whole room and lets you control the consistency. Paste-the-wall papers need a roller and a pasting table; paste-the-paper papers need a brush and careful book time.
A seam roller, a smoothing brush and a sharp knife are the basic tools. A plumb line for the first strip prevents a crooked room.
Stairwells are measured by the wall area plus the diagonal drop, and the strips are long, so the waste is higher. Measure the tallest point and add the repeat before cutting.
High walls need a platform and two people. If the wall is over about 10 feet, add the cost of access equipment or hire a decorator rather than balancing on a ladder.
Two rolls at 56 sq ft per roll with 15 percent waste.
Single rolls are usually about 56 sq ft, but usable coverage is less after pattern matching.
Fifteen percent for small repeats, 20 percent for large repeats and rooms with many openings.
Yes, subtract large openings, but do not over-subtract: offcuts around them are often unusable.
Not recommended. Remove the old paper so the new paper can bond and seams stay flat.
Two rolls at 56 sq ft per roll with 15 percent waste.
Measure the wall area, subtract large openings, add 15 percent waste and divide by the roll coverage.
Not recommended. Remove the old paper so the new paper bonds and the seams stay flat.
It helps on uneven or dark walls and makes seams less visible.
Roll coverage varies by product; the calculator uses the sq ft per roll you enter. Waste guidance follows common wallpaper installation practice. · Last updated October 30, 2026 · Report a correction