Wallpaper Roll Calculator
Accurately calculate how many wallpaper rolls you need for your home renovation project.
Recommended: 10% for simple rooms, 15% for average, 20% for complex layouts
Exclude Areas
Wallpaper Calculation Results
Wall Area: sq ft
Adjusted Area (after excluded areas): sq ft
Single Roll Coverage: sq ft
Number of Rolls Needed:
Recommended Purchase: rolls
Disclaimer
This calculator provides an estimate only. Actual wallpaper requirements may vary based on room irregularities, installation techniques, and individual pattern matching. We recommend consulting with a professional installer for final quantities.
About Our Wallpaper Roll Calculator
Our Wallpaper Roll Calculator is a practical tool designed to help you estimate the number of wallpaper rolls needed for your home renovation project. Getting the right amount of wallpaper is crucial - too little means delays while you order more, and too much is a waste of money.
How Our Calculator Works
The calculator takes into account your room dimensions, wallpaper roll specifications, pattern repeat (if any), and adjusts for doors, windows, and recommended waste percentage to provide an accurate estimate of how many rolls you'll need to purchase.
The Wallpaper Calculation Formula
The basic formula used in our calculations is:
Total Rolls = (Adjusted Wall Area ÷ Single Roll Coverage) × (1 + Waste Factor)
Where:
- Adjusted Wall Area = Perimeter × Height - Area of doors and windows
- Single Roll Coverage = (Roll Width × Roll Length) ÷ 144 (to convert to sq ft)
- Waste Factor = Additional percentage for pattern matching and trimming
Key Features:
- Calculate wallpaper rolls needed for any room size
- Account for pattern repeat requirements
- Adjust for doors and windows
- Include waste percentage for trimming and pattern matching
- Get recommendations based on industry standards
How to Use:
- Enter your room dimensions (width, length, and ceiling height)
- Input the wallpaper roll specifications (width and length)
- Specify the pattern repeat (if applicable)
- Adjust the waste percentage based on your room complexity
- Enter the number of doors and windows to exclude
- Click "Calculate Wallpaper Rolls" to see your results
Understanding Pattern Repeat
Pattern repeat is the vertical distance between where a pattern is repeated on the wallpaper. Larger pattern repeats require more material to properly match the design across seams:
- No Repeat (0 inches): Solid colors or random patterns that don't need matching
- Small Repeat (1-6 inches): Simple patterns with minimal waste
- Medium Repeat (7-12 inches): More noticeable patterns requiring careful matching
- Large Repeat (13+ inches): Bold, distinctive patterns that require significant additional material
Tips for Accurate Estimation
Measure Carefully: Double-check all measurements before calculating.
Consider Room Complexity: Irregular walls, alcoves, or multiple corners may require additional wallpaper.
Check Manufacturer Specifications: Always verify the actual dimensions of your chosen wallpaper.
Allow for Mistakes: Especially if you're a DIY installer, it's wise to purchase an extra roll.
Whether you're a homeowner planning a DIY project or a professional seeking quick estimates, our Wallpaper Roll Calculator helps you plan your project with confidence and avoid costly mistakes.
Frequently Asked Questions
What's the difference between a single roll and a double roll of wallpaper?
A single roll is the standard unit of measurement for wallpaper, but many manufacturers sell their wallpaper in double rolls (two single rolls packaged together). When purchasing, make sure you know whether the quoted price is for a single or double roll. Our calculator provides results in single roll equivalents, so you may need to halve the number if your supplier sells in double rolls.
Why is the pattern repeat important?
Pattern repeat affects how much wallpaper you'll need because it determines how much material may be wasted when matching patterns across seams. Larger repeats require more material to ensure patterns line up properly. For example, a wallpaper with a 24-inch repeat pattern might require up to 30% more material than a solid color or non-repeating pattern.
Should I buy extra wallpaper for future repairs?
Yes, it's generally recommended to keep at least one extra roll (or 10% of your total purchase) for future repairs. Wallpaper patterns and colors can vary between production batches (called "lots"), so if you need to make repairs years later, you may not be able to find an exact match. Having spare wallpaper from the same lot ensures you can make seamless repairs.
How do I account for a room with sloped ceilings?
For rooms with sloped ceilings, measure the height at the highest and lowest points, calculate the average, and use that as your ceiling height. Keep in mind that sloped ceilings often result in more waste, so you may want to increase your waste percentage to 20-25% for these rooms.