OneTool

Wallpaper Calculator

Wall area and roll coverage → rolls to buy.

Default 27 sq ft ≈ US single roll

  • Wall area

    352.0 sq ft

  • Net area

    302.0 sq ft

  • With waste

    382.0 sq ft

  • Rolls needed

    15

What is this tool?

Wallpaper rolls list usable coverage that varies by region and product. Pattern repeats force extra waste when matching motifs. Estimate paintable/wallpaperable wall area, apply pattern and general waste factors, then divide by roll coverage and round up.

How to use it

  1. Enter room size and deduct doors/windows.
  2. Set roll coverage and pattern-repeat waste.
  3. Buy whole rolls and confirm the product’s stated coverage.