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Wallpaper Calculator

Construction
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Calculates the number of wallpaper rolls needed for a room based on the room's dimensions and wallpaper roll size.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Room Length, Room Width, Room Height, Wallpaper Roll Width, Wallpaper Roll Length, Door Width (Optional), Door Height (Optional), Window Width (Optional), and Window Height (Optional) in the units shown.

Step 2

Read Usable Length Per Roll (Assuming no waste), Roll Width (in Feet), Window Area, Door Area, Wall Perimeter, Area Per Roll, Width per strip, Number of Strips Per Roll, Total Wall Area, Net Wall Area (Excluding Doors and Windows), and Number of Rolls Needed in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Small Room

Room Length: 10 ft; Room Width: 8 ft; Room Height: 8 ft; Wallpaper Roll Width: 20.5 in; Wallpaper Roll Length: 33 ft; Door Width (Optional): 3 ft; Door Height (Optional): 7 ft; Window Width (Optional): 3 ft; Window Height (Optional): 4 ft

Usable Length Per Roll (Assuming no waste): 33 ft; Roll Width (in Feet): 1.708333333 ft; Window Area: 12 sq ft; Door Area: 21 sq ft; Wall Perimeter: 36 ft; Area Per Roll: 56.375 sq ft; Width per strip: 1.708333333 ft; Number of Strips Per Roll: 4 strips; Total Wall Area: 288 sq ft; Net Wall Area (Excluding Doors and Windows): 255 sq ft; Number of Rolls Needed: 5 rolls

Medium Room

Room Length: 14 ft; Room Width: 12 ft; Room Height: 9 ft; Wallpaper Roll Width: 20.5 in; Wallpaper Roll Length: 33 ft; Door Width (Optional): 3 ft; Door Height (Optional): 7 ft; Window Width (Optional): 3 ft; Window Height (Optional): 4 ft

Usable Length Per Roll (Assuming no waste): 33 ft; Roll Width (in Feet): 1.708333333 ft; Window Area: 12 sq ft; Door Area: 21 sq ft; Wall Perimeter: 52 ft; Area Per Roll: 56.375 sq ft; Width per strip: 1.708333333 ft; Number of Strips Per Roll: 3 strips; Total Wall Area: 468 sq ft; Net Wall Area (Excluding Doors and Windows): 435 sq ft; Number of Rolls Needed: 8 rolls

Large Room

Room Length: 18 ft; Room Width: 15 ft; Room Height: 10 ft; Wallpaper Roll Width: 20.5 in; Wallpaper Roll Length: 33 ft; Door Width (Optional): 3 ft; Door Height (Optional): 7 ft; Window Width (Optional): 3 ft; Window Height (Optional): 4 ft

Usable Length Per Roll (Assuming no waste): 33 ft; Roll Width (in Feet): 1.708333333 ft; Window Area: 12 sq ft; Door Area: 21 sq ft; Wall Perimeter: 66 ft; Area Per Roll: 56.375 sq ft; Width per strip: 1.708333333 ft; Number of Strips Per Roll: 3 strips; Total Wall Area: 660 sq ft; Net Wall Area (Excluding Doors and Windows): 627 sq ft; Number of Rolls Needed: 12 rolls

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