Wallpaper calculator

Estimate wallpaper rolls for a room — strips, rolls with allowance, and optional cost.

Strips are counted around the perimeter at the roll width; each door/window saves the full strips it covers (door 0.9 m, window 1.2 m). Each strip gets 10 cm of trim plus one pattern repeat. Counts are estimates — check the pattern match on site.

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How to use

  1. Enter room length, width, height, and door/window counts.
  2. Pick a roll size or enter a custom one.
  3. Read strips, rolls, and cost.

What it supports

Metric rooms up to 100 × 100 m with wall height up to 6 m; rolls up to 3 m wide and 100 m long, repeat ≤ 200 cm, waste allowance ≤ 100%, up to 100 doors and windows. Strips run around the perimeter at roll width; doors (0.9 m) and windows (1.2 m) save only the full strips they cover. Adds 10 cm trim and one pattern repeat per strip. Bay windows, sloped ceilings, and half-covered openings are not modeled — treat counts as estimates.

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