210 tiles
I will assume you mean that the tiles are 14 inches square and that the room is 18 ft by 33 ft. 18 ft is 216 inches, and 33 ft is 396 inches. As a first approximation, the room is 85536 sq inches so dividing this by 14 squared, or 196. we get just over 436.4 squares. However, this is unlikely to be enough with cutting to fit. It's usual to start in the centre of the room and to lay as many full tiles as possible, then to cut tiles to fill in the borders. You'd need about 140 full tiles, depending on exactly where you start. The number of part tiles needed will then depend on whether they have a nap or not. I'd say you need at least another 21 to be sure.
16 square 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.
I assume you mean an 8ft x 6ft room, which is 48ft2. I assume you mean 12in x 12in tiles, which are 1ft2 tiles. I don't know how many tiles are in a box, but you would need 48 12in x 12in tiles.
12...
14x14=156 sq ft 12x12=1sq ft assuming no waste (and there always waste) = 156 tiles are needed...(always buy an extra 10-15% fr wastage/broken ones etc )
If the carpet tiles you are using are the standard 12" square, then multiple your length and width to get the square footage. In this case your room would need a minimum of 196 tiles. CHeck the box for pattern repeat and remember to add tiles for damage and waste.
144/(1.5*1.5) = 64 tiles, but if you are using this to determine how many are needed to tile a room, you need to add at least 10% for edging around the room. So, you probably need at least 71 or more tiles.
To find square feet multiply 14x14 14x14=196 sqft
144 tiles
210 tiles
I will assume you mean that the tiles are 14 inches square and that the room is 18 ft by 33 ft. 18 ft is 216 inches, and 33 ft is 396 inches. As a first approximation, the room is 85536 sq inches so dividing this by 14 squared, or 196. we get just over 436.4 squares. However, this is unlikely to be enough with cutting to fit. It's usual to start in the centre of the room and to lay as many full tiles as possible, then to cut tiles to fill in the borders. You'd need about 140 full tiles, depending on exactly where you start. The number of part tiles needed will then depend on whether they have a nap or not. I'd say you need at least another 21 to be sure.
Depends on the size of the tiles.
12 tiles by 18 tiles or 216 tiles total
120 tiles
16 square tiles