1. What is a Wallpaper Calculator?

Definition: This calculator determines how many rolls of wallpaper you need based on your wall area and the coverage per roll.

Purpose: It helps homeowners and contractors accurately estimate wallpaper requirements for Home Depot purchases.

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, and the result is always rounded up to ensure you have enough wallpaper.

3. Importance of Accurate Wallpaper Calculation

Details: Proper calculation prevents shortages during installation and helps budget accurately for your project.

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: Wallpaper must be purchased in whole rolls, and rounding up ensures you have enough material for pattern matching and waste.

Q2: What's the standard coverage per roll?
A: Most wallpaper rolls cover about 30 square feet, but this can vary - always check the product specifications.

Q3: Should I add extra for pattern matching?
A: Yes, for patterned wallpaper, add 10-20% more to account for pattern matching and alignment.

Q4: How do I calculate wall area?
A: Measure wall height and length, then multiply them together. Subtract areas for windows and doors.

Q5: Does this include waste?
A: No, consider adding 10-15% extra to account for trimming and mistakes during installation.