1. What is a Wallpaper Calculator with Repeat (UK)?

Definition: This calculator estimates the number of wallpaper rolls needed for a wall, accounting for pattern repeat which is common in UK wallpaper.

Purpose: It helps homeowners and decorators accurately estimate wallpaper requirements, minimizing waste and additional purchases.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Number of wallpaper rolls needed
• \( H \) — Wall height (meters)
• \( Roll_H \) — Roll height (meters, typically 10m)
• \( Repeat \) — Pattern repeat distance (meters)
• \( W \) — Wall width (meters)
• \( Roll_W \) — Roll width (meters, typically 0.53m)

Explanation: The formula accounts for the pattern repeat by reducing the usable roll height, then calculates how many strips are needed across the wall width.

3. Importance of Pattern Repeat Calculation

Details: Pattern repeat significantly affects wallpaper requirements. Without accounting for it, you may underestimate by 10-30%. This is particularly important for large patterns.

4. Using the Calculator

Tips:

• Standard UK roll size is 10m long × 0.53m wide (default values)
• Pattern repeat is typically 0-0.64m (default 0.2m)
• Measure wall dimensions accurately
• Add 10% extra for pattern matching and errors

5. Frequently Asked Questions (FAQ)

Q1: Why is pattern repeat important?
A: Each drop must align with the previous one's pattern, meaning some wallpaper gets wasted in the matching process.

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

Q3: How do I find the pattern repeat measurement?
A: It's printed on the wallpaper label, usually between 0-64cm.

Q4: Why do UK calculations differ from others?
A: UK wallpaper typically comes in different roll sizes (10m × 0.53m) compared to other regions.

Q5: Should I round up the result?
A: The calculator automatically rounds up to whole rolls since you can't buy partial rolls.