Rolls of Wallpaper

Calculate full-height strips with allowance for matching repeated pattern.

Your numbers

Rolls wey you need buy

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Planning estimate from your measurements and assumptions. Confirm dimensions, product coverage and local installation requirements before you buy.

Formula

For r = 0, cut length na c = h+t; for r > 0, use c = r ceil((h+t)/r). Rolls na N = ceil[ceil(P/w)/floor(L/c)]. h na wall height, t na trim, r na pattern repeat, P na wall perimeter, w na roll width, and L na roll length, all for m. ceil dey round up and floor dey round down.

Calculate full-height strips with allowance for matching repeated pattern.

Example wey show the calculation

Distance round wall wey you want cover (m): 10
Height of the wall (m): 2.5
Width of wallpaper roll (m): 0.5
Length of wallpaper roll (m): 10
Distance before pattern repeat (m); zero if none: 0
Extra length for trimming each strip (m): 0

Rolls wey you need buy: 5
Strips wey the work need: 20
Usable strips from each roll: 4
Length to cut for each strip: 2.5 m

Where e fit work and limits

Planning estimate from your measurements and assumptions. Confirm dimensions, product coverage and local installation requirements before you buy.

We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.

Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.

Version of di formula: 38456ef79aa1 · Example don get check: 2026-10-30

Method