You'd take 5ft x 5ft which will give you 25 square feet. Since you're talking about 12" tiles (1ft square) you'd need at minimum 25 tiles to cover your area.
You will need 44 six inch tiles to cover 11 square feet.
Floor area = 12 ft x 18 ft = 216 square feet. There are 4 six-inch square tiles needed for each square foot, so 864 tiles are needed.
5*6=30*12=360/4=90 tiles
236 18-inch tiles.
It would be 9 tiles wide by 12 tiles long. That gives you a total of 108 tiles.
5,184 2-square-inch tiles are needed.
128.2 tiles
1120 plus 10% for salvage= roughly1230tiles. you can probably return unused tiles
dafsdfa
400 6" x 6" tiles are needed.
About 197 (196.875) 16" x 16" tiles will feet in that area.
22.2 tiles so buy 23 tiles.