1. What is a Wallpaper Calculator?

Definition: This calculator estimates the number of wallpaper rolls needed based on your wall area and the coverage per roll.

Purpose: It helps homeowners and decorators determine how much wallpaper to purchase for a room.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The total wall area is divided by the coverage per roll, then rounded up to the nearest whole number since you can't buy partial rolls.

3. Importance of Accurate Calculation

Details: Proper calculation prevents buying too much (wasting money) or too little (risk of dye lot differences).

4. Using the Calculator

Tips: Measure your wall area carefully (height × width for each wall). Standard rolls cover about 30 sq ft, but check your specific product.

5. Frequently Asked Questions (FAQ)

Q1: Why round up?
A: Wallpaper is sold in whole rolls, and you need extra for pattern matching and mistakes.

Q2: What's a typical roll coverage?
A: Most standard rolls cover about 30 sq ft, but European rolls often cover 25 sq ft.

Q3: Should I add extra?
A: Consider adding 10-15% extra for pattern matching and errors, especially with large patterns.

Q4: How do I calculate wall area?
A: Measure each wall's height and width, multiply to get area, then sum all walls.

Q5: What about doors and windows?
A: You can subtract them, but it's often better to include them for waste allowance.