2.25 square feet
It is not clear what is meant by an "18x18 square feet" tile. 18ft * 18 ft = 324 square feet, so that one tile will be more than enough. An 18 inch by 18 inch tile cannot be a 18x18 square feet tile.
That depends on the unit of measurement for the tiles. Assuming the tiles are 18 inches by 18 inches, one tile is 324 square inches = 2.25 square feet. Multiply by 106 to get 238.5 square feet. If the tiles are 18 feet by 18 feet (pretty big tiles, but hey, it could happen), one tile is 324 square feet, so 106 pieces of that would be 34344 square feet.
It would take approximately 311 tiles plus 5% to 10% waste depending on how you lay your floor out and how many cuts you will have.
The answer will depend on the units used for measuring the tiles which you have failed to specify.
2.25 square feet
It is not clear what is meant by an "18x18 square feet" tile. 18ft * 18 ft = 324 square feet, so that one tile will be more than enough. An 18 inch by 18 inch tile cannot be a 18x18 square feet tile.
if you are quoting inches, then a 18x18 tile measures 2.25 square feet. On that basis you would need 106.66 or 107 to the nearest.
That depends on the unit of measurement for the tiles. Assuming the tiles are 18 inches by 18 inches, one tile is 324 square inches = 2.25 square feet. Multiply by 106 to get 238.5 square feet. If the tiles are 18 feet by 18 feet (pretty big tiles, but hey, it could happen), one tile is 324 square feet, so 106 pieces of that would be 34344 square feet.
It would take approximately 311 tiles plus 5% to 10% waste depending on how you lay your floor out and how many cuts you will have.
18 inches = 1.5 ft, so each tile is 2.25 sq ft, number required = 249/2.25 = 111
2 square feet per tile.
The answer will depend on the units used for measuring the tiles which you have failed to specify.
0.44444 square feet per tile.
You would need 800 tile assuming you had no waste at all. Since this is unlikely you will need 825 tile.
102.22 tiles because each tile is 2.25 sq.ft. 230 / 2.25 =102.22 so really 103 tiles.
Assuming 18x18 refers to 18 inches by 18 inches, each tile has an area of 1.5*1.5 = 2.25 sq ft. 214 sq feet at 2.25 sq feet per tile = 214/2.25 = 95.11... so 96 tiles. That also assumes that the area to be covered is well behaved and that nearly all the offcuts are reused.