144
A 13 x 13 tile is 1.74 sq ft. 144/1.74 = 123 tiles
12 x 12 = 144 26208 / 144 = 182 So, you will need 182 tiles
220 x 144 = 31,680 sq inches / 324 (18" x 18") =97.7 + 30% waste = 130 tiles
440 sq feet = 440 x 144 sq inchesanswer = 440 x 144/ (20 x 20) = 440 x 144 /400 = 1.1 x 144 = 158.4 tiles ~ 159 tiles
144
144/(1.5*1.5) = 64 tiles, but if you are using this to determine how many are needed to tile a room, you need to add at least 10% for edging around the room. So, you probably need at least 71 or more tiles.
A 13 x 13 tile is 1.74 sq ft. 144/1.74 = 123 tiles
864 tiles.144 tiles per square foot.
144 assuming no waste.
12 x 12 = 144 26208 / 144 = 182 So, you will need 182 tiles
61 whole tiles represent 1421/3 square feet 144 square feet works out to 61.714 tiles (rounded)
220 x 144 = 31,680 sq inches / 324 (18" x 18") =97.7 + 30% waste = 130 tiles
If your tiles are 12 inches x 12 inches you would need 144 of them.
440 sq feet = 440 x 144 sq inchesanswer = 440 x 144/ (20 x 20) = 440 x 144 /400 = 1.1 x 144 = 158.4 tiles ~ 159 tiles
15012*12=144 square inches150 square feet =21600 square inches21600/144=150
12 x 12 tiles cover 144 ft2, so the number of tiles needed is 1800/144, which equals 12.5.