Wallpaper Calculator
Calculate how many rolls of wallpaper you need for any room. Accounts for doors, windows, pattern repeats, and waste factor.
49.2Kuses
9/10(295)
Room Dimensions (feet)
Roll Specifications (inches/feet)
Rolls Needed
13
11 rolls + waste = 13 rolls
Wall Area
486 sq ft
Deductions
44 sq ft
Net Area
442 sq ft
Total Strips
31
How to Calculate Wallpaper
Measure room perimeter x height for total wall area. Subtract doors and windows. Divide by usable area per roll. Add 10% for waste and pattern matching.
- Standard US roll: 21" x 33' (covers ~56 sq ft)
- Euro roll: 21" x 33' or 27" x 27'
- Always buy an extra roll for repairs
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Disclaimer: This tool is provided as-is for informational and educational purposes only.