Wallpaper Calculator

Straight Match Patterns

The simplest type where pattern elements align horizontally across adjacent strips.

• Minimal Waste: Usually 5-10% cutting waste
• Easy Installation: Patterns line up at the seam
• Examples: Stripes, simple geometric patterns

Half-Drop (Offset) Patterns

Pattern elements are offset by half the repeat distance on alternating strips.

• More Waste: Typically 10-15% cutting waste
• Complex Matching: Requires careful pattern alignment
• Examples: Brick patterns, diagonal designs

Random Match Patterns

No specific pattern repeat—each strip can be hung without matching.

• Least Waste: Only 5% for trimming
• Fastest Installation: No pattern matching required
• Examples: Textures, abstract designs

Underestimating Pattern Repeat Waste

Large pattern repeats (over 12 inches) can create significant waste. Always use our calculator's pattern repeat feature for accurate estimates.

Forgetting Ceiling Height Variations

Older homes often have varying ceiling heights. Measure at multiple points and use the highest measurement for calculations.

Not Ordering Extra for Repairs

Always order 1-2 extra rolls for future repairs. Wallpaper patterns can be discontinued, making exact matches impossible later.

How do I calculate wallpaper pattern repeat?

Pattern repeat is the distance between identical pattern elements. Measure from one motif to the next identical motif vertically. This measurement is usually printed on the wallpaper label.

How much extra wallpaper should I order?

Order 10-15% extra for standard patterns and up to 20% for complex patterns or irregular rooms. This accounts for cutting waste, pattern matching, and future repairs.

What is wallpaper roll coverage?

Standard American wallpaper rolls are typically 20.5 inches wide and 33 feet long, covering about 56 square feet. European rolls may have different dimensions. Always check the specific coverage on your chosen wallpaper.