🖼️ Free Wallpaper Calculator

Wallpaper Calculator

Get the exact number of wallpaper rolls needed for your room — including pattern repeat and waste.

🖼️ Wallpaper Calculator

Room Length (ft)

Room Width (ft)

Wall Height (ft)

Roll Length (ft)

Roll Width (inches)

Pattern Repeat (inches)

Number of Doors

Number of Windows

Always buy 10–15% extra — dye lots can vary and discontinued patterns are hard to match later.
Start in an inconspicuous corner and work toward your focal wall.
Use a plumb line to ensure your first strip is perfectly vertical.
Soak paste wallpaper for the manufacturer's recommended time before hanging.
Keep windows closed for 24–48 hours after hanging to allow uniform drying.