Wallpaper helps make a room look fresh and stylish. Before you buy wallpaper, you must know how many wallpaper rolls do I need for a 12×18 living room. You can find this by measuring the wall area and comparing it with the coverage of one roll.
How Many Wallpaper Rolls Do You Need for a 12 × 18 Living Room?
To find the number of wallpaper rolls, you first calculate the total wall area of the room. Then you compare that area with the coverage of one wallpaper roll.
Find the Perimeter of the RoomThe perimeter tells you the total length of all walls.
Perimeter = 2 × (Length + Width)
Perimeter = 2 × (18 + 12)
Perimeter = 2 × 30
Perimeter = 60 feet
This means the total width of all walls in the room is 60 feet.
Calculate the Total Wall AreaNext, multiply the perimeter by the wall height. Most living rooms have a standard wall height of 8 feet.
Wall Area = Perimeter × Height
Wall Area = 60 × 8
Wall Area = 480 square feet
So, the total wall space you need to cover is 480 sq. ft.
Check Wallpaper CoverageA double roll of wallpaper usually covers:
56.40 sq. ft for 20.5-inch wallpaper
60.75 sq. ft for 27-inch wallpaper
For 20.5-inch wallpaper:
480 ÷ 56.40 ≈ 8.5 rolls
You cannot buy half rolls, so you round up.
You will need 9 double rolls.
For 27-inch wallpaper: 480 ÷ 60.75 = 7.9 rolls
Round up to the next whole number.
You will need 8 double rolls.
For a 12 × 18 living room with 8-foot walls, you will need:
9 double rolls of 20.5-inch wallpaper, or
8 double rolls of 27-inch wallpaper.
You should also buy
one extra rollto cover cutting waste or pattern repeat. This helps ensure you have enough wallpaper to finish the job smoothly. I hope this helps you.
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How Many Wallpaper Rolls do I Need for a 12×18 Living Room?
Harish44
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2026-03-18T09:28:31+00:00 2026-03-20T16:46:22+00:00Comment
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