About This Calculator
This calculator helps you determine the number of wallpaper rolls required for your room. It accounts for room perimeter, ceiling height, pattern repeat (for matching patterns), and includes a wastage allowance.
Pattern repeats significantly affect wallpaper usage - papers with large repeats require more rolls as each strip must start at a matching point in the pattern.
How to Use
- Measure the room perimeter (add up all wall lengths)
- Measure wall height from floor to ceiling
- Check roll width and length on the wallpaper packaging
- Note the pattern repeat (0 for plain/textured papers)
- Estimate area of doors and windows to deduct
- Add wastage allowance (10-15% recommended)
Standard Roll Sizes
European Standard
10m × 530mm
~5.3m² per roll
UK Standard
10m × 520mm
~5.2m² per roll
Wide Width
10m × 700mm
~7m² per roll
Double Roll
10m+ × 1000mm
Covers more area per roll
Pattern Repeat Guide
| Pattern Type | Typical Repeat | Impact |
|---|---|---|
| Plain/Textured | 0mm (free match) | Minimal waste |
| Small Pattern | 50-150mm | Low waste |
| Medium Pattern | 200-400mm | Moderate waste |
| Large Pattern | 500mm+ | High waste, more rolls |
Important Tips
- Always buy all rolls from the same batch number for colour consistency
- Buy an extra roll for future repairs (wallpaper patterns are discontinued)
- Pattern repeat significantly increases wallpaper requirements
- Measure twice - mistakes are costly with patterned paper
- Check roll length - some are 10.05m, others may be 8m or 15m
Ready to Calculate?
Enter your room dimensions and wallpaper specifications to get accurate roll counts.
Launch CalculatorUKUK Building Regulations
References & Sources
Standards Cited
- Euro Roll Standard — Standard European Wallpaper Roll Dimensions
Defines the standard Euro roll as 0.52m (520mm) wide x 10.05m long, used as the default roll size - WIA Guidelines — Wallpaper Installers Association — Installation Guidelines
Industry guidance on pattern matching, wastage allowances, and strip calculation methods
Formulas Used
- Wall Area:
wallArea = roomPerimeter x wallHeight
Source: Standard geometry - Net Area:
netArea = wallArea - doorsWindowsArea
Source: WIA installation guidelines - Effective Strip Height (with pattern):
stripHeight = ceil(wallHeight / patternRepeat) x patternRepeat
Source: WIA installation guidelines — Each strip must start at a pattern repeat boundary for pattern matching - Strips per Roll:
stripsPerRoll = floor(rollLength / effectiveStripHeight)
Source: WIA installation guidelines - Total Strips:
totalStrips = ceil(roomPerimeter / rollWidth)
Source: WIA installation guidelines - Rolls with Wastage:
rolls = ceil(ceil(totalStrips / stripsPerRoll) x (1 + wastage% / 100))
Source: WIA installation guidelines
Key Assumptions
- Standard Euro roll dimensions: 0.52m wide x 10.05m long — European wallpaper industry standard
- Default 10% wastage for trimming and alignment — WIA installation guidelines
- Pattern repeat of 0 indicates a plain wallpaper with no matching required — WIA installation guidelines