1. What is Wallpaper Calculation?

The wallpaper calculation estimates the number of rolls needed to cover a wall, accounting for pattern repeats and roll coverage area. It helps prevent over- or under-purchasing wallpaper for your project.

2. How Does the Calculator Work?

The calculator uses the wallpaper calculation formula:

Where:

• \( width \) — Width of the wall
• \( height \) — Height of the wall
• \( pattern\_repeat \) — Vertical pattern repeat length
• \( roll\_area \) — Coverage area of one roll
• \( \lceil \rceil \) — Ceiling function (round up)

Explanation: The equation accounts for both the wall area and additional length needed to match patterns vertically.

3. Importance of Accurate Calculation

Details: Proper calculation ensures you purchase enough wallpaper (including extra for pattern matching) while minimizing waste and additional purchases.

4. Using the Calculator

Tips: Measure wall dimensions carefully. For pattern repeat, check wallpaper specifications. Roll area is typically provided by the manufacturer (common sizes: 28-36 sq ft per roll).

5. Frequently Asked Questions (FAQ)

Q1: What if my wallpaper has no pattern repeat?
A: Enter 0 for pattern repeat in this case, and the calculation will be based purely on wall area.

Q2: Should I add extra for mistakes?
A: It's recommended to purchase 10-15% more than calculated, especially for complex patterns or if you're inexperienced.

Q3: How do I measure for wallpaper?
A: Measure width at multiple points (walls may not be perfectly straight) and use the largest measurement. Measure height floor to ceiling.

Q4: What about doors and windows?
A: This calculator assumes full wall coverage. For walls with openings, you may subtract their area from total calculation.

Q5: Does this work for metric measurements?
A: Yes, as long as all measurements use the same units (all in feet or all in meters).