Calculyn

Wallpaper Calculator

Estimate how many rolls of wallpaper you need for a room.

ft
ft

Results update as you type.

Rolls needed

6double rolls

Based on standard double rolls (~56 sq ft each)

Net wall area
324sq ft
Usable per roll
56sq ft
Rolls needed6

Was this calculator helpful?

Quick answer

48 ft of 8-ft walls with 3 openings is 324 sq ft, needing 6 double rolls with no pattern repeat.

How it works

Multiply total wall width by height, subtract about 20 sq ft per door or window, then divide by the usable coverage of a roll. Pattern repeats waste paper, so usable coverage drops as the repeat grows.

Formula

Rolls = ⌈(Wall area − Openings × 20 sq ft) ÷ Usable roll coverage⌉

Assumptions & limitations

  • Results are rounded for display.

Frequently asked questions

Single or double rolls?

Wallpaper is usually priced in single rolls but sold in double rolls. This estimate uses double-roll coverage — check the label on your chosen paper.