1. What is a Wallpaper with Repeat Pattern Calculator?

Definition: This calculator estimates the number of wallpaper rolls needed for a wall, accounting for pattern repeats.

Purpose: It helps homeowners and decorators accurately purchase wallpaper while accounting for pattern matching.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Number of wallpaper rolls needed
• \( H \) — Wall height (feet)
• \( Roll_H \) — Roll height (feet, typically 33ft)
• \( Repeat \) — Pattern repeat length (feet)
• \( W \) — Wall width (feet)
• \( Roll_W \) — Roll width (feet, typically 1.75ft)

Explanation: The formula calculates strips needed vertically (accounting for pattern repeat) multiplied by strips needed horizontally, then rounded up.

3. Importance of Pattern Repeat Calculation

Details: Accounting for pattern repeats prevents shortages and ensures proper pattern alignment across the wall.

4. Using the Calculator

Tips: Enter wall dimensions, roll specifications (default 33ft height × 1.75ft width), and pattern repeat (default 0.5ft). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is pattern repeat important?
A: Each drop must start at the same point in the pattern, requiring extra length to match patterns.

Q2: What are standard wallpaper roll dimensions?
A: Typically 33ft long × 1.75ft wide (European) or 27ft × 2ft (American).

Q3: How do I find my pattern repeat length?
A: Check the wallpaper label - it's usually between 0-24 inches (0-2 feet).

Q4: What if my wall has windows/doors?
A: Calculate total wall area first, then subtract window/door areas.

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