Wallpaper Calculator
Calculate the exact amount of wallpaper needed for your room, including waste allowance and pattern matching for professional results.
Wallpaper Calculation Results
48 sq ft
60 sq ft
48 sq ft
60 sq ft
Coverage Breakdown:
Purchase Information:
Professional Tips
- Order all rolls from the same batch to ensure color consistency
- Always purchase an extra roll for future repairs and touch-ups
- Consider the pattern direction when measuring ceiling height
- Account for pattern matching at corners and around obstacles
About
Our Wallpaper Calculator helps homeowners, decorators, and contractors accurately estimate wallpaper requirements for any room size, including pattern matching and waste allowances.
Why Choose
Professional-grade calculations that account for pattern repeats, different wall heights, doors, windows, and various wallpaper specifications for accurate material estimates.
Features
Multiple room types, custom door/window sizes, pattern matching calculations, waste allowance settings, and support for different measurement units and wallpaper sizes.
Benefits
Avoid costly overordering or project delays from underordering. Get precise estimates that save money and ensure professional results for your wallpaper installation.
Measure Your Space
Enter room dimensions, count doors and windows, and select your measurement units. Include ceiling height and any special architectural features.
Specify Wallpaper Details
Input wallpaper roll dimensions, pattern repeat measurements, and select the appropriate pattern matching type for accurate calculations.
Get Professional Results
Review detailed breakdown of coverage, waste allowance, and total rolls needed. Use the shopping list for your wallpaper purchase.
Frequently Asked Questions – Wallpaper Calculator
Standard waste allowance is 10-15% for most projects. Use 10% for simple patterns and experienced installers, 15% for complex patterns or DIY projects, and up to 20% for large patterns, vaulted ceilings, or rooms with many corners and obstacles.
Pattern repeat is the distance between identical points in a wallpaper pattern. It affects how much wallpaper you need because strips must be cut to align patterns. Larger repeats create more waste. Drop match patterns typically require 25% more material than straight match patterns.
Yes, but with caution. Subtract standard doors and large windows (over 15 sq ft) from your calculations. Don’t subtract small windows, electrical outlets, or architectural details as the waste from cutting around these offsets the saved area.
Common roll sizes are 20.5″ × 33 ft (American standard), 21″ × 33 ft (European), or 27″ × 27 ft (designer). Always check your specific wallpaper specifications. Wider rolls cover more area but may be harder to handle during installation.
Always buy at least one extra roll for future repairs, especially for high-traffic areas or homes with children/pets. Also buy extra if: the wallpaper is being discontinued, you’re using an expensive or custom pattern, or the room has complex architectural features.