18 in = 1.5 ft
(18 in)2 = (1.5ft)2
2.25 sq. ft. per tile
600 / 2.25 = 266 + 2/3
I do not know the shape of the 600 sq ft, so I would recommend buying a little extra, say 270-300 tiles.
49 tiles
You would need 450 tiles
25 geinus
81 tiles squared because if it's a square then it would be 9x9 which is 81
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
49 tiles
You would need a total of 89 tiles (88.88 tiles exactly) with those measurements to cover that area.
You would need 173 tiles (you would have fractions of tiles left over)
You would need 450 tiles
25 geinus
You would need a total of 92 tiles. It would take just over 91 tiles to cover the area given.
81 tiles squared because if it's a square then it would be 9x9 which is 81
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
Assuming you mean 16x16 inches tiles... 441 tiles would cover the area exactly
You would need 29 tiles of that size to cover that area (28.77 tiles) to be precise,
108 carpet tiles
You would need a total of 36 tiles to cover that area.