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Wallpaper Rolls Needed for a Room Calculator

Number of wallpaper rolls required to paper a rectangular room.

Estimates how many wallpaper rolls are needed to cover four walls, accounting for doors and windows: strips per roll = floor(roll_length / wall_height); total rolls = ceil(total_strips / strips_per_roll).

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

m
m
m
m
m
m²

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

Total wall area minus openings, divided by coverage per roll.

In depth

Estimates how many wallpaper rolls are needed to cover four walls, accounting for doors and windows: strips per roll = floor(roll_length / wall_height); total rolls = ceil(total_strips / strips_per_roll).