Can I calculate wallpaper for a room that isn't rectangular?

The calculator accounts for doors and windows by subtracting their total area from the wall surface before estimating roll quantity.

How does pattern repeat affect the number of rolls needed?

You can customize door and window dimensions, or use the default sizes provided by the calculator.

ConstructionFree Tool

Wallpaper Calculator

Provided byOmni Calculatoromnicalculator.com

Wallpaper calculator finds the number of wallpaper rolls you need to buy for your room.

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About this tool

What Wallpaper Calculator does

A wallpaper calculator that estimates how many rolls are required to cover a room's walls. Users enter room dimensions—length, width, and height—as well as the length and width of the chosen wallpaper roll. The tool also factors in doors, windows, and pattern repeat to refine the total. The output includes the number of rolls needed and an adjusted room area, giving a practical figure for purchasing supplies.

Step by step

How to use the Omni Calculator Wallpaper Calculator

1
Select the project type: single wall or rectangular room
2
Enter the room length, width, and height (or input surface area directly)
3
Input the roll length and roll width, and specify the number of doors and windows with their dimensions
4
Review the calculated number of rolls and adjusted room area before purchasing

Is it right for you

Best for

Homeowners, decorators, and DIY enthusiasts planning a room redecoration who want an accurate roll estimate to minimize waste and avoid shortages.

Limitations

Pattern repeat adjustments may require manual measurement
Results are estimates based on standard roll sizes and openings

Questions

Wallpaper Calculator FAQ

Can I calculate wallpaper for a room that isn't rectangular?: The calculator accounts for doors and windows by subtracting their total area from the wall surface before estimating roll quantity.
How does pattern repeat affect the number of rolls needed?: You can customize door and window dimensions, or use the default sizes provided by the calculator.

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