Wallpaper Calculator

Wall Width (feet)

Wall Height (feet)

Roll Width (inches)

Roll Length (feet)

Waste Factor (%)

Room Length (feet)

Room Width (feet)

Room Height (feet)

Number of Doors

Number of Windows

Roll Width (inches)

Roll Length (feet)

Waste Factor (%)

Total Area (sq ft)

Pattern Repeat (inches)

Wall Height (feet)

Roll Width (inches)

Roll Length (feet)

Total Area (sq ft)

Price per Roll ($)

Coverage per Roll (sq ft)

Labor Cost (per sq ft)

Supplies Cost ($)

Waste Factor (%)

Wallpaper Installation Guidelines

Standard Roll Sizes:

US Standard: 20.5" wide × 16.5 feet long (≈28 sq ft)
European: 21" wide × 33 feet long (≈56 sq ft)
Commercial: 27" wide × 27 feet long (≈60 sq ft)

Pattern Repeat Guidelines:

No pattern/random match: 5-10% waste
Small repeat (0-6"): 10-15% waste
Medium repeat (7-18"): 15-20% waste
Large repeat (19"+): 20-25% waste

Important Tips:

Always buy from the same batch/dye lot for color consistency
Order 1-2 extra rolls for future repairs
Subtract 15 sq ft for standard door, 10 sq ft for window
Consider ceiling height and pattern repeat when ordering
Pre-pasted wallpaper is easier but traditional paste offers better control
Proper wall preparation (cleaning, priming) is essential