Wallpaper Calculator
Wallpaper Calculator
Calculate the exact number of wallpaper rolls needed for your interior design project. Perfect for traditional wallpaper, peel-and-stick, and removable wallpaper installations.
What This Calculator Includes:
- Wall area to be covered (square feet)
- Roll dimensions: length and width
- Coverage calculation per roll
- Pattern matching considerations
Standard Wallpaper Roll Sizes:
- American single roll: 20.5" wide × 16.5 ft long (~28 sq ft)
- European roll: 21" wide × 33 ft long (~48 sq ft)
- Designer wallpaper: 27" wide × 27 ft long (~50 sq ft)
- Grasscloth/Natural: 36" wide × 24 ft long (~72 sq ft)
Pattern Matching & Waste Factors:
- No pattern/random match: 5% waste
- Straight match: 10-15% waste
- Drop/offset match: 15-25% waste
- Large repeat patterns: 20-30% waste
Professional Wallpaper Tips:
- Order extra rolls: dye lots can vary between productions
- Check pattern direction: some designs have specific orientation
- Measure twice: account for obstacles like outlets and fixtures
- Prime walls: use appropriate primer for better adhesion
Common Wallpaper Applications:
- Accent walls: focal point in living rooms or bedrooms
- Powder rooms: small spaces perfect for bold patterns
- Dining rooms: elegant patterns for formal spaces
- Children's rooms: fun, removable options available
Types of Wallpaper:
- Traditional paste wallpaper: requires adhesive application
- Peel and stick: self-adhesive, removable options
- Pre-pasted: water-activated adhesive backing
- Fabric wallpaper: textile-based wall coverings
Frequently Asked Questions
How many rolls of wallpaper do I need?
Divide wall area by coverage per roll. For example: 120 sq ft wall ÷ 28 sq ft per roll = 4.3 → order 5 rolls (always round up).
How much wallpaper is in a single roll?
Standard American single rolls cover ~28 sq ft (20.5" × 16.5'). Double rolls cover ~56 sq ft. Check manufacturer specifications.
Should I add extra for pattern matching?
Yes! Add 10-15% for straight match patterns, 15-25% for drop match patterns. Large repeats may need 25-30% extra.
Can I return unused wallpaper rolls?
Return policies vary. Many retailers accept unopened rolls within 30 days. Keep receipts and check return policy before purchasing.
How do I measure wall area for wallpaper?
Measure wall height × width for each wall, then subtract door and window areas. Add all wall areas together for total square footage.
What if I need partial coverage (accent wall)?
Measure only the wall(s) you want to cover. This calculator works for any wall area - full rooms or single accent walls.