Wallpaper Calculator

Calculate exactly how many rolls of wallpaper you need for your room. Our calculator accounts for pattern repeats and waste.

How to Use This Calculator

Total Wall Area: Width × Height × Number of Walls

Usable Area: Total area minus windows and doors

Roll Coverage: (Roll Width ÷ 12) × Roll Length

Rolls Needed: Usable Area ÷ Roll Coverage × Waste Factor

The waste factor is 1.1 (10%) for solid colors and 1.2 (20%) for patterns to account for matching and trimming.

We recommend 10-15% extra for solid colors and 15-20% for patterns. Our calculator already includes this allowance.

Pattern repeat is the distance between where a pattern repeats on the wallpaper. It's important for matching patterns across strips.

Only subtract large windows and doors. Small windows and standard doors are often left in the calculation as a buffer.

See a wallpaper on your own wall, or design your own

Preview paint colors on your actual walls

Take a look at the main hues in the photo of the room. These shades stand out the most. Turn them into wall paint options that fit closely.

Calculate crown molding for any room

Considering paint instead?

Upload a photo of your room and try new floors, walls, colors and furniture with AI before you order materials.