Wallpaper Calculator
Calculate the number of wallpaper rolls needed for your room. Account for pattern matching and waste.
Room Dimensions
Wallpaper Specifications
Common: 21 or 27 inches
Common: 33 or 56 feet
Set to 0 for no pattern
Wallpaper Needed
11 Single Rolls
or 6 Double Rolls
Room Perimeter
54 ft
Net Wall Area
414 sq ft
Strips Needed
31
Strips Per Roll
3
Coverage Details
Gross Wall Area486 sq ft
Deductions (doors/windows)-72 sq ft
Roll Coverage57.8 sq ft
Usable Coverage49.1 sq ft
Expected Waste15-20%
Tips
- Buy all rolls from the same dye lot
- Order 1-2 extra rolls for mistakes
- Larger patterns need more matching
- Check roll width - US vs European sizes differ
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.