1. What is a Wallcovering Calculator with Pattern Repeat?

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

Purpose: It helps interior designers, decorators, and homeowners accurately estimate wallpaper quantities while considering pattern repeats.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Number of rolls needed (rounded up)
• \( H \) — Wall height (feet)
• \( Roll_H \) — Roll height (feet)
• \( Repeat \) — Pattern repeat length (feet)
• \( W \) — Wall width (feet)
• \( Roll_W \) — Roll width (feet)

Explanation: The formula accounts for the extra material needed to match patterns by reducing the usable roll height by the repeat length.

3. Importance of Pattern Repeat Calculation

Details: Proper calculation ensures you purchase enough material to complete the project without visible mismatches at seams.

4. Using the Calculator

Tips: Enter wall dimensions, roll specifications, and pattern repeat. Standard values are pre-filled (16.5ft roll height, 2ft width, 0.5ft repeat).

5. Frequently Asked Questions (FAQ)

Q1: Why does pattern repeat affect the calculation?
A: Each drop must start at the same point in the pattern, requiring extra length to match patterns between strips.

Q2: What if my wallpaper has no pattern repeat?
A: Enter 0 for pattern repeat, and the calculator will use the full roll height.

Q3: Why are results rounded up?
A: You can't purchase partial rolls, so we always round up to ensure you have enough material.

Q4: How do I measure pattern repeat?
A: It's the vertical distance between where the pattern repeats (usually marked on the wallpaper label).

Q5: Should I add extra for mistakes?
A: Yes, consider adding 10-15% to the calculated amount for trimming errors and future repairs.