1. What is a Wallpaper Calculator?

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

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 of wallpaper needed (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, 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 color mismatch between batches).

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: How do I measure wall area?
A: Multiply wall height by width for each wall, then sum all walls. Subtract window/door areas.

Q2: What's typical roll coverage?
A: Standard rolls cover about 30 sq ft, but check manufacturer specifications as this varies.

Q3: Why round up?
A: Wallpaper must be purchased in whole rolls, and extra is needed for pattern matching and mistakes.

Q4: Should I buy extra?
A: Yes, add 10-15% extra for pattern matching and future repairs (not included in calculation).

Q5: What about wallpaper with patterns?
A: Patterned wallpaper may require more rolls due to waste from matching - consult with your supplier.