Estimate how many rolls of wallpaper you need for your room, accounting for doors, windows, and pattern repeats.
Room Dimensions
ft
ft
Wallpaper Details
in
ft
in
Calculation Results
Prepping for a project?
Enter your wall and wallpaper dimensions to see exactly how many rolls you should purchase.
About this calculator
Overview
The Wallpaper Calculator helps you estimate the number of rolls needed for a room by calculating the total wall area and subtracting common openings like doors and windows. It also factors in pattern repeats, which can significantly increase the amount of paper required to match designs side-by-side.
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Pro Tips
Always buy one extra roll from the same dye lot to ensure color consistency if you need more later.
Standard door area: 21 sq ft (2 m²); Standard window area: 15 sq ft (1.4 m²).
If your pattern has a 'random match', you'll have much less waste than with a 'large repeat'.
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Fun Facts
"Wallpaper can last up to 15 years, making it more durable than most paint finishes."
"The first known wallpaper was used in China as early as 200 BC."
"Standard double rolls are usually more economical and provide more continuous length for high ceilings."
Formula: Rolls = (Wall Area - Openings) / (Roll Area adjusted for Repeat)
