Hmm, my answer does not agree with others listed below here, however here is what I got and how...
you would need 117.3 tiles plus a recommended 10% for breakage or a total of 129 tiles.
This is how I come by that answer.
18 by 18 is 324 square Inches (Sqin)
264 Square Feet = 38016 Sqin.
38016 sqin divided by 324 sqin tiles equals 117.33 tiles.
my younger brother (former contractor) insists that tile tends to break and a 10% margin of error should be planned for. thus 118 (round to next whole tile) times 110% equals 129 pieces of tile 18x18.
Hope this helps.
5,184 2-square-inch tiles are needed.
18 10x10-inch tiles.
125 16-inch tiles.
297 16x16-inch tiles.
113 tiles
5,184 2-square-inch tiles are needed.
18 10x10-inch tiles.
125 16-inch tiles.
297 16x16-inch tiles.
236 18-inch tiles.
113 tiles
90 tiles.
55 tiles
56 tiles to cover 224 square feet.
1296 Tiles
You will need at least 67 tiles. This will cover 150.75 square feet.
It will require a minimum of 1,462 tiles. That number will cover about 1,850.34 square feet.