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Wallpaper Calculator

Number of wallpaper rolls for a room.

Estimate how many rolls of wallpaper you need to cover the walls of a rectangular room, with extra for pattern matching.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

m
m
m
m
m

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Wall area = perimeter × height. Roll coverage = roll length × roll width. Add 15% for pattern matching and trimming.

In depth

Estimate how many rolls of wallpaper you need to cover the walls of a rectangular room, with extra for pattern matching.