1. What is a Wallpaper Calculator?

Definition: This calculator determines how many rolls of wallpaper are needed to cover a given wall area.

Purpose: It helps homeowners and interior designers accurately estimate wallpaper requirements for projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Rolls of wallpaper needed (always rounded up)
• \( A \) — Total wall area to be covered (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 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 to whole rolls?
A: Wallpaper is sold in complete rolls, and having extra allows for pattern matching and mistakes.

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

Q3: Should I account for windows and doors?
A: No, it's recommended to calculate total wall area without subtracting openings for pattern matching.

Q4: How do I calculate wall area?
A: Measure wall height and length, then multiply. For multiple walls, calculate each separately and sum.

Q5: Should I buy extra rolls?
A: Yes, consider purchasing 10-15% extra for pattern matching and future repairs.