1. What is a Wallpaper Roll Calculator?

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

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

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 per roll (square feet)

Explanation: The 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: Rounding up ensures you have enough wallpaper to complete the job, accounting for pattern matching and waste.

Q2: What's typical roll coverage?
A: Standard wallpaper rolls cover about 30 sq ft, but this varies by brand and pattern repeat.

Q3: How do I calculate wall area?
A: Measure wall height and width, then multiply: Area = Height × Width (for each wall, then sum them).

Q4: Should I buy extra rolls?
A: Yes, consider buying 10-15% extra for pattern matching and future repairs.

Q5: Does this account for doors/windows?
A: No, subtract door/window areas from your total wall area before using this calculator.