1. What is a Wallpaper Calculator?

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

Purpose: It helps homeowners and interior designers 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 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 Wallpaper Calculation

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

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 result?
A: Wallpaper is sold in whole rolls, and you need extra for pattern matching and mistakes.

Q2: What's a typical roll coverage?
A: Standard 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 length, then multiply. Don't subtract windows/doors unless very large.

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

Q5: Does this account for pattern repeats?
A: No, complex patterns may require more wallpaper - consult manufacturer guidelines.