Wallpaper Calculator
Calculate how many rolls of wallpaper you need for a room.
Accounts for pattern repeat waste.
Wallpaper Needed
Wallpaper calculation:
Wall Area = Room Perimeter × Wall Height
Usable area per roll = Roll Length × Roll Width
Rolls Needed = Wall Area / Usable Area per Roll
Pattern match waste:
- No pattern / random match: ~5% waste
- Straight match: ~10% waste
- Drop match / half-drop: ~15–20% waste
Standard roll sizes:
- US single roll: 27 in × 27 ft (~60.75 sq ft)
- Euro roll: 53 cm × 10 m (~5.3 sq m)
Tips:
- Subtract area for doors (~21 sq ft / 2 sq m each) and windows (~15 sq ft / 1.4 sq m each)
- Always round up and buy an extra roll for mistakes and future repairs