How Many Rolls of Wallpaper?
Wallpaper is trickier than paint because it comes in fixed strips, and offcuts at the top and bottom of each strip can't always be reused. The reliable method is to work in strips rather than area. First, figure how many full-height strips you need to cover the total width of your walls: divide the wall perimeter by the roll's width. Then figure how many strips you can cut from one roll: divide the roll's length by your wall height plus a little trimming allowance.
Why pattern repeat matters
If your paper has a repeating pattern, adjacent strips must line up, which means you often waste part of each strip to align the design. A large repeat can cost you a strip's worth of paper per drop. The calculator adds the repeat into each strip's length, so a bold patterned paper correctly shows you needing more rolls than a plain one for the same wall.
Order from one batch
The single most important buying tip: get all your rolls in the same batch or lot number, printed on the packaging. Wallpaper colors drift subtly between print runs, and a mismatched roll shows as a faint stripe down your wall. Buy one extra roll beyond the calculator's number — both as insurance against cutting mistakes and so you have matching paper for repairs years later, when your batch is long gone.
Frequently asked questions
- How do I measure for wallpaper?
- Add up the width of every wall you're papering for the perimeter, and measure floor-to-ceiling height.
- Does pattern repeat really add rolls?
- Yes — aligning a repeating design wastes part of each strip, so bold patterns need noticeably more.
- Why buy from the same batch?
- Colors drift between print runs. A different batch number can show as a visible stripe on the wall.