Wallpaper Calculator
Estimate how many wallpaper rolls and paste packs you need for walls, accent walls, bedrooms, living rooms, and DIY decorating projects.
📐 Wall Size
Enter the length and width of the wall area you want to cover.
🚪 Doors, Windows & Openings
Enter the total area that does not need wallpaper.
Include doors, windows, closets, or any uncovered sections.
🧻 Wallpaper Roll Details
Use the size from your wallpaper roll label.
🎨 Pattern & Trimming Waste
Extra wallpaper for trimming and pattern matching.
Recommended Waste
• 10% — Standard wallpaper projects
• 15% — Pattern matching, corners, or beginner DIY work
• 20% — Large patterns, complex rooms, or matching-heavy designs
🪣 Wallpaper Paste Coverage
Coverage per paste pack or bucket.
Check the paste package label for coverage. If unsure, use 200 sq ft per pack as an estimate.
Wall Area
96.0
sq ft
Net Wall Area
76.0
sq ft
Roll Coverage
56.4
sq ft / roll
Paste Needed
1
packs
3
Wallpaper Rolls Needed
Includes 10% waste allowance
🪣 1 Paste Packs
Based on 200 sq ft per pack
Financial disclaimer: This calculator is for informational purposes only and does not provide financial, tax, legal, loan, or investment advice. Actual results may vary depending on lender terms, tax rules, fees, deductions, and personal circumstances.
📘How It Works
This wallpaper calculator estimates how many wallpaper rolls and paste packs you need for a wall, accent wall, bedroom wall, living room wall, hallway wall, or other home decorating project.
Wall Area = Wall Length × Wall Width
Net Wall Area = Wall Area − Doors, Windows, and Openings
Roll Coverage = Roll Width × Roll Length
Base Rolls = Net Wall Area ÷ Roll Coverage
Total Rolls = Base Rolls + Waste Allowance
Paste Packs = Net Wall Area ÷ Paste Coverage per Pack
🎯 When to Use
- 🧱 Accent walls, feature walls, and single wall decorating projects
- 🛏️ Bedroom, nursery, living room, hallway, and dining room walls
- 🚪 Wall areas with doors, windows, closets, or uncovered openings
- 🧻 Estimating wallpaper rolls before buying online or in-store
- 🎨 Patterned wallpaper projects that need trimming and matching waste
- 🪣 Estimating wallpaper paste or adhesive packs before installation
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❓ FAQ
🧻 How do I calculate how many wallpaper rolls I need?
Measure the wall length and wall width, then multiply them to get the wall area. Subtract doors, windows, or uncovered openings, divide the net wall area by one roll's coverage, and add waste for trimming and pattern matching.
📐 How much wallpaper do I need for one accent wall?
For one accent wall, multiply the wall length by the wall width. Then divide that area by the coverage of one wallpaper roll and add a waste allowance. This works well for bedroom walls, living room feature walls, home office walls, and dining room accent walls.
🚪 Should I subtract doors and windows?
Yes, subtract large doors, windows, closets, built-ins, or uncovered openings for a more accurate estimate. For small openings or patterned wallpaper, some DIY users keep a little extra material for trimming around edges.
🎨 How much extra wallpaper should I buy?
Use about 10% extra for standard wallpaper projects. Increase the waste allowance to 15% for pattern matching, corners, or beginner DIY work. Use 20% for large patterns, complex layouts, or matching-heavy designs.
🪣 How much wallpaper paste do I need?
Divide the net wall area by the paste coverage per pack. For example, if one pack covers 200 square feet and your net wall area is 400 square feet, you need about 2 paste packs.
📦 Should I round up wallpaper rolls?
Yes. Wallpaper is sold by the roll, so always round up to the next full roll. Buying a little extra from the same batch is safer than running out later and getting a roll with a slightly different color.
🏷️ Why should I check the wallpaper roll label?
Wallpaper roll sizes can vary by brand, style, and country. Some products are sold as single rolls, double rolls, panels, or peel-and-stick sheets. Use the actual roll width and roll length from the product label for the most accurate result.
🧱 Can I use this calculator for peel-and-stick wallpaper?
Yes. Peel-and-stick wallpaper uses the same wall area and roll coverage logic. You may not need paste, but you should still add waste for trimming, alignment mistakes, and pattern matching.
🧴 Does wallpaper type affect paste coverage?
Yes. Heavy vinyl, textured wallpaper, non-woven wallpaper, and traditional paper wallpaper may require different adhesives. Check the wallpaper instructions and paste package before installation.
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