Wallpaper Calculator

While wallpaper is often priced by the single roll, it is almost always packaged and shipped as a 'double roll' (also called a bolt) to ensure continuous, uninterrupted sheets. A standard double roll is typically 33 feet (10 meters) long and 21 inches (53 cm) wide.

If your wallpaper has a design (like stripes, florals, or geometric patterns), you must align the pattern vertically on adjacent sheets. This creates waste at the top and bottom of each strip. Large repeats (over 12 inches) require buying about 15-20% more paper.

For typical doors and windows, it is safest not to deduct their full area. The cutouts from these spaces are usually needed to fill in the small wall sections above doors and below windows. Our calculator subtracts 3 feet (0.9m) of perimeter per opening to stay conservative.

A 'straight match' means the pattern aligns horizontally across matching strips. A 'drop match' aligns diagonally, requiring you to shift every other strip down by half the repeat distance, which generates the most waste.

Wallpaper is manufactured in runs or dye batches. If you run short, ordering another roll later may result in a slightly different color shade. Having a matching spare roll protects against installation mistakes and makes future repairs easy.