1. What is a Wallpaper Calculator with Repeat Pattern?

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 considering pattern matching requirements.

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 16.5ft)
• \( Repeat \) — Pattern repeat length (feet)
• \( W \) — Wall width (feet)
• \( Roll_W \) — Roll width (feet, typically 1.59ft)

Explanation: The formula accounts for both the wall dimensions and the extra wallpaper needed to match patterns vertically.

3. Importance of Pattern Repeat Calculation

Details: Pattern repeats significantly affect material requirements. Ignoring them may result in insufficient wallpaper for proper pattern matching.

4. Using the Calculator

Tips: Enter wall dimensions, roll specifications, and pattern repeat length. Standard roll size is 16.5ft x 1.59ft (European standard).

5. Frequently Asked Questions (FAQ)

Q1: What if my wallpaper has no pattern repeat?
A: Enter 0 for the repeat value. The calculation will be based purely on wall area and roll size.

Q2: Why do we subtract repeat from roll height?
A: This accounts for the wasted wallpaper at each drop where you must match the pattern.

Q3: What are typical pattern repeat values?
A: Common repeats range from 0" (no repeat) to 24" (2ft), depending on the wallpaper design.

Q4: Should I add extra for mistakes?
A: Yes, consider adding 10-15% extra rolls for pattern matching, corners, and mistakes.

Q5: Does this work for all wallpaper types?
A: The calculator works best for standard wallpaper. Textured or specialty wallpapers may require adjustments.