Wallpaper Calculator
Wallpaper is sold by the roll but used by the strip. This calculator counts the strips your walls need, works out how many usable strips each roll yields (accounting for pattern repeat waste) and rounds up to whole rolls.
Wallpaper Calculator
Paint & Wall
ft
ft
in
ft
in
0 for plain/no pattern. Use 2× the printed repeat for half-drop patterns.
Rolls needed
8rolls
Strips required
31strips
Usable strips per roll
4
Strip length includes 0 m pattern allowance
Wall coverage
170.6 ft² · 416 ft² of wall
Calculation breakdown
- 1Strips:
⌈15.85 ÷ 0.52⌉ = 31 - 2Strip length:
2.44 + 0 repeat = 2.44 m - 3Strips per roll:
⌊10.06 ÷ 2.44⌋ = 4 - 4Rolls:
⌈31 ÷ 4⌉ = 8
- All rolls should share the same dye lot — check before opening.
Strips = ⌈Total wall run ÷ Roll width⌉.
Strip length = Wall height + Pattern repeat (repeat is trimmed away on each strip for alignment).
Strips per roll = ⌊Roll length ÷ Strip length⌋. Rolls = ⌈Strips ÷ Strips per roll⌉.