The amount will depend a lot on a few things. # The width of the carpet you selected. The most common is 12' but it can come 15' and even more rarely 13'6. # The pattern match of the carpet. Most don't have one, but they are common in loop berbers and pattern carpets. A 2" x 2" pattern won't add a lot to your yardage, but some newer Stainmaster patterns are 20" x 36" and larger. # Even if your room is a perfect square and likely its not, doors and entryways will affect where a seam will go. With this stated, using a 12' carpet without a pattern match you would need about 114.67 square yards of carpet This would mean you would have a few seams.
nine square yards.
Total square yards: 18.78
144 square feet = 16 square yards.
24.444 (recurring) square yards.
23.67 square yards
nine square yards.
1 square yard = 9 square feet 2 square yards = 18 square feet 3 square yards = 27 square feet . . . 24 square yards = 216 square feet
28.4 square yards.
There are 36 square yards in a room 18 feet by 18 feet
Total square yards: 18.78
1,440 square feet or 160 square yards.
36 square yards.
37.3 square yards.
5 square yards.
144 square feet = 16 square yards.
24.444 (recurring) square yards.
If the room is 9 yards wide by 12 yards long, then 108 square yards.