Wallpaper Calculator

Calculate exactly how many wallpaper rolls you need for any room. Visual wall-by-wall breakdown included.

Room Diagram

Wall 1 (Width) --

Wall 2 (Width) --

Wall 3 (Length) --

Wall 4 (Length) --

Measurement Unit

Room Width (ft)

Room Length (ft)

Ceiling Height (ft)

Windows

Doors

Roll Width

Roll Length

Pattern Repeat (inches, 0 for no repeat)

Rolls Needed

Total Wall Area

Waste Percentage

Estimated Cost

Price Per Roll ($)

Wall Area (sq ft) --

Rolls Required --

Price Per Roll --

Total Estimated Cost --

Input your room width, length, and ceiling height in feet or meters.

Enter number of windows and doors to subtract from wall area.

Choose your wallpaper roll width and length from standard sizes.

See exactly how many rolls you need, waste %, and cost estimate.

1. Wall Area = 2 × (Width + Length) × Height

2. Subtract Openings = Wall Area − (Windows × 15 sq ft) − (Doors × 21 sq ft)

3. Coverage Per Roll = Roll Width (ft) × Roll Length (ft)

4. Pattern Adjustment = If repeat > 0, effective width decreases for matching

5. Rolls Needed = ceil(Wall Area / Coverage Per Roll)