75, 6.25 12 x 12 ft tiles to cover surface of 900 ft2
A 12x12 inch tile covers one square foot. You will need 24 of them, plus a few for spoilage.
13'x13' = 169 square feet
About 197 (196.875) 16" x 16" tiles will feet in that area.
Each tile will cover 2 square feet. So you will need 12.5 tiles.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
190
14
68
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
375
1540
650
If the tiles are 12x12 inches square - you would need... 75 !
549!
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
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?