Wallpaper Calculator

How to use

1. Enter the total length of all walls (perimeter) — do not subtract doors and windows, because the strips also run over them.
2. Enter the roll width and length from the roll label.
3. Enter the pattern repeat — keep 0 for plain paper.
4. The number of rolls will be shown.

Note: Each strip is lengthened to the next multiple of the pattern repeat so the design aligns on every strip — this is the real waste of patterned wallpaper.