1. What is a Wallpaper Roll Calculator?

Definition: This calculator determines how many rolls of wallpaper are needed based on your wall area and the coverage area per roll.

Purpose: It helps homeowners and decorators purchase the correct amount of wallpaper for their projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Rolls needed (always rounded up)
• \( A \) — Total wall area (square feet)
• \( Roll\_A \) — Coverage area per roll (square feet)

Explanation: The total wall area is divided by the coverage per roll, and the result is always rounded up to ensure you have enough wallpaper.

3. Importance of Accurate Calculation

Details: Proper calculation prevents purchasing too much or too little wallpaper, saving money and ensuring pattern matching.

4. Using the Calculator

Tips: Enter the total wall area in square feet and the coverage per roll (default 30 sq ft). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why round up the number of rolls?
A: Wallpaper must be purchased in whole rolls, and rounding up ensures you have enough material for the entire project.

Q2: What's a typical coverage per roll?
A: Standard wallpaper rolls typically cover about 30 square feet, but this can vary by brand and pattern.

Q3: Should I account for windows and doors?
A: No, this calculator assumes total wall area. For more accuracy, subtract window/door areas from your total before calculating.

Q4: What about pattern matching?
A: Complex patterns may require additional rolls. Consider adding 10-20% to your calculated amount for pattern matching.

Q5: How do I measure wall area?
A: Multiply wall height by wall width for each wall, then sum all wall areas to get total square footage.