Assuming the tiles are 16 inches square:
200 square feet = 200 x 12 x 12 = 28,800 square inches.
The tiles are 16 x 16 = 256 square inches.
28,800 / 256 = 112.5
So you would need a minimum of 113 tiles, not allowing for any that would need cutting at the edges of the room.
Depends on the size of the tiles.
128.2 tiles
If the floor tiles are measured in inches and the room is measured in feet then the tiles are 1sq feet and the room is 6x8 = 48 sq feet so you would need 48 tiles.
675 of them. Get extra for breakage.
205.3125 tiles exactly OR 206 tiles, with a bit left over!
Depends on the size of the tiles.
5.8
128.2 tiles
The amount of tiles needed to cover a floor will depend on the size of the floor.
If the floor tiles are measured in inches and the room is measured in feet then the tiles are 1sq feet and the room is 6x8 = 48 sq feet so you would need 48 tiles.
240
675 of them. Get extra for breakage.
205.3125 tiles exactly OR 206 tiles, with a bit left over!
To cover 720 sq feet of floor with 18" x 18" tile, you would need 320 tiles.
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1.5 tiles. (I know it's unusual, but it's true.)
240 square tiles are needed