1. What is Wallpaper Calculation?

The wallpaper calculation helps you determine how many rolls of wallpaper you need for a project based on your wall area, pattern repeat allowance, and the coverage provided by each roll.

2. How Does the Calculator Work?

The calculator uses the wallpaper calculation formula:

Where:

• Wall Area — Total square footage of walls to be covered
• Repeat Allowance — Additional wallpaper needed for pattern matching
• Coverage Per Roll — Square footage covered by one roll (typically 25-36 sq ft)

Explanation: The equation accounts for both the actual wall space and additional wallpaper needed for pattern matching, divided by how much each roll covers.

3. Importance of Accurate Calculation

Details: Accurate calculation prevents purchasing too much or too little wallpaper, saving money and ensuring all walls can be covered with the same batch.

4. Using the Calculator

Tips: Measure your wall area carefully, check your wallpaper's pattern repeat value, and verify the coverage per roll (usually printed on packaging). Standard rolls cover about 30 sq ft.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure wall area?
A: Multiply wall height by total length of all walls to be papered. Subtract windows/doors (about 15 sq ft per standard opening).

Q2: What is repeat allowance?
A: Extra wallpaper needed to match patterns. Typically 10-20% of wall area for large patterns, less for small patterns.

Q3: Why does coverage per roll vary?
A: Roll sizes differ by country (US rolls typically cover 30 sq ft, European rolls often cover 25 sq ft).

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

Q5: What if my walls are textured?
A: Add 10-20% more for textured walls as they require more wallpaper for proper adhesion.