Free online Wallpaper Calculator. Calculate standard rolls, pattern repeat margins, and total project costs based on wall size.
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How to Use Wallpaper Calculator
Enter wall width and wall height.
Select roll size preset (Standard or Large Roll).
Input the pattern repeat length (set to 0 for solid colors).
View net rolls, wastage allowances, and total rolls needed.
Wall area measurements for Wallpaper
Measure the height and total horizontal width of the wall you want to paper. Area is calculated as Width × Height. Doors and windows are usually not subtracted because you need full strips to cut around them.
Wallpaper roll dimensions reference
- **Standard Roll**: 33 ft × 21 in (10m x 53cm) = 57.4 sq ft / 5.3 sq m
- **Double/Large Roll**: 33 ft × 41 in (10m x 106cm) = 112.5 sq ft / 10.6 sq m
Frequently Asked Questions
What is the size of a standard wallpaper roll?
A standard wallpaper roll is typically 33 feet (10m) long and 21 inches (53cm) wide, covering 57.42 square feet.
What is pattern repeat?
Pattern repeat is the vertical distance between identical design elements. Matching patterns side-by-side creates waste, requiring extra rolls.