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, decorators, and contractors estimate wallpaper requirements accurately.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Rolls of wallpaper needed (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, and the result is always rounded up since you can't buy partial rolls.

3. Importance of Accurate Wallpaper Calculation

Details: Proper calculation prevents over-purchasing (wasting money) or under-purchasing (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: Calculate each wall's area (height × width) and sum them. Subtract window/door areas (typically 15-20 sq ft each).

Q2: What's a typical roll coverage?
A: Standard rolls cover about 30 sq ft, but check your specific wallpaper as coverage varies.

Q3: Should I add extra for pattern matching?
A: Yes, add 10-20% more for large patterns or complex installations.

Q4: What if my walls are very tall?
A: Some wallpapers come in extra-long rolls. Adjust the roll coverage value accordingly.

Q5: Does this include waste from mistakes?
A: No, consider buying 1 extra roll for mistakes, especially if you're inexperienced.