80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
375
If you're talking floor tiles as opposed to wall tiles and by 12x12 you mean they are 12 inches square, then the answer is 300. Because each tile is one square foot and a 15'x20' room is 300 square feet. Simple, eh?
36 tiles. I would hire a tiler if I was you, this doesn't sound like your 'thing'
A 12 x 12 tile covers one square foot. So you need 432 of them, plus some for spoilage.
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
650
549!
375
If the tiles are 12x12 inches square - you would need... 75 !
A 12x12 tile is 1 sq foot, so you will need 198 tiles.
If they are 12 inches x 12 inches then you would need 399 tiles.
Well if 12x12 is one square foot and you have 44 you need to cover figure 10% for breakage (5 tiles) it looks like 50 tiles will do ya
6 tiles that are 12 ft x 12 ft should be enough.
If you're talking floor tiles as opposed to wall tiles and by 12x12 you mean they are 12 inches square, then the answer is 300. Because each tile is one square foot and a 15'x20' room is 300 square feet. Simple, eh?
one 12 x 12 tile is one sq ft you need 480/1 = 480 tiles
256 tiles