Wallpaper Calculator

Estimate how many rolls of wallpaper you need for your room, accounting for doors, windows, and pattern repeats.

Room Dimensions

Unit System

Total Wall Length (ft)

Wall Height (ft)

Number of Doors

Number of Windows

Wallpaper Details

Roll Width (in)

Roll Length (ft)

Pattern Repeat (in)

Calculation Results

Prepping for a project?

Enter your wall and wallpaper dimensions to see exactly how many rolls you should purchase.

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.

💡

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'.

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)

Used with this

Similar tools that might be useful

AC Room Size Calculator

Find the perfect AC unit size based on room dimensions and environmental factors.

AC Tonnage Calculator

Calculate air conditioning capacity in tons and BTU for your home with precision.

Air Changes per Hour (ACH)

Measure ventilation effectiveness by calculating room air replacement rates.