wallpaper
Wallpaper rolls
Strips per roll and total rolls with pattern allowance.
Results are approximate. Verify with manufacturer specifications or consult a professional.
Project inputs
IMPERIAL
Enter a value in ft.
Enter a value in ft.
Enter a value in ft.
Enter a value in ft.
Enter a value in ft.
Includes breakage, spillage, onsite adjustments
Material output
Updates instantly as you type.
Primary output
50ea
50 ea
≈ 46.3 ea primary output
Rolls
Your units
17 ea
Results are approximate. Verify with manufacturer specifications or consult a professional.
How it works
Frequently asked questions
Country defaults
United States · USD · imperial
Waste factor: 8.0%
Context & guidance
Results are approximate. Verify with manufacturer specifications or consult a professional.
About This Calculator
Calculate the exact number of wallpaper rolls needed for your walls, accounting for room perimeter, wall height, pattern repeat, waste factors (typically 10-15% for simple patterns, 15-20% for patterns with large repeats), and country-specific roll sizes. Supports both metric and imperial units with automatic conversion.
Step-by-Step Instructions
Measure Room Perimeter
Add up all wall lengths in the room. For rectangular rooms: Perimeter = 2 × (Length + Width). For L-shaped or irregular rooms, measure each wall segment separately and sum them. Typical residential rooms have perimeters of 12-30m (40-100ft).
Enter Wall Height
Measure from floor to ceiling. Standard ceiling heights are 2.4-2.7m (8-9ft). Measure at multiple points and use the average if heights vary. Add 10-15cm (4-6in) extra for trimming at top and bottom.
Account for Pattern Repeat
Pattern repeat is the vertical distance before the pattern repeats. Small patterns (0-20cm): 10-12% waste. Medium patterns (20-50cm): 12-15% waste. Large patterns (50cm+): 15-20% waste. The calculator adjusts waste based on repeat size.
Select Roll Size
Standard roll sizes vary by country: European (10m × 0.53m), US (8.2m × 0.53m), or custom sizes. The calculator uses country-specific defaults. Verify roll dimensions with your supplier.
Calculate Rolls Needed
The calculator shows: total wall area, number of rolls needed (including waste and pattern matching), and estimated cost. Always round up to full rolls. Order 1-2 extra rolls for future repairs.
Order Materials
Order all wallpaper from the same batch/lot for color consistency. Buy 1-2 extra rolls for future repairs. Store rolls vertically in a dry, cool location to prevent damage.
Common Mistakes
Not accounting for pattern repeat
Pattern repeat significantly affects waste. A pattern with 50cm repeat needs 15-20% waste vs 10-12% for small patterns. Always check pattern repeat on the wallpaper label and enter it accurately.
Forgetting to subtract openings
Doors and windows reduce wallpaper needs. Standard door: ~2.0 m², single window: 1.5-2.5 m². While the calculator accounts for this, verify your measurements are accurate.
Not ordering extra for pattern matching
Patterns with large repeats require extra rolls for matching. Always order 1-2 extra rolls beyond calculated needs, especially for patterns with repeats >30cm.
Using wrong roll size
Roll sizes vary by country and manufacturer. European rolls are typically 10m × 0.53m, US rolls 8.2m × 0.53m. Verify with your supplier and adjust the calculator if needed.
Pro Tips
Buy all wallpaper from the same batch/lot. Color variations between batches are noticeable, especially with textured or metallic wallpapers.
For patterns with large repeats (>50cm), add 20% waste instead of 15%. Large repeats create more offcuts that can't be reused.
Calculate paste separately: typically 0.5-1kg per roll depending on wallpaper type (vinyl, paper, fabric). Heavy wallpapers require more paste.
Plan your layout before starting. Decide where to start (usually near a door or window) and how to handle pattern matching at corners.
Keep 1-2 extra rolls for future repairs. Wallpaper manufacturers discontinue patterns, and you'll need matching rolls for damage or expansion.
Store rolls vertically in a dry, cool location. Horizontal storage or exposure to moisture can damage wallpaper and affect adhesion.
Frequently Asked Questions
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