Free Wallpaper Calculator – Rolls Needed with Pattern Repeat

Free wallpaper calculator to estimate rolls needed including pattern repeat waste. Supports metric and imperial units for accurate wallpaper planning.

Wallpaper Calculator Guide

The Wallpaper Calculator estimates the number of rolls needed for your walls. Enter the total wall width, wall height, and roll dimensions. The calculator accounts for pattern repeat waste, which can significantly increase the number of rolls required.

Pattern repeat is the vertical distance between repeating design elements. A 25cm pattern repeat means each strip must be cut 25cm longer than the wall height to align the pattern. Large pattern repeats (60cm+) can require 30–40% more rolls than plain paper.

Always order 10–15% more rolls than calculated. Wallpaper from the same dye lot is essential for consistent color matching — rolls from different lots can have subtle variations. Store extra rolls in case you need to patch a section later.