In theory, 220. However, If you find the exact center of the room, and work from there out (since you line up your tile from center, not from an edge), then you may find that you need a little extra at the edges, especially if you are tiling a pattern into the floor.
To find the exact center of your room, and to mark your starting grid lines, measure each wall at the bottom from one corner to the next, and mark the exact halfway point. If you have a closet or other feature protruding into the room from the corner, measure as if it weren't there. Then mark two lines on the floor, one running the length of the room, and one running the width of the room. In theory, if you have measured your room accurately, then these two lines will be perfectly 90 degrees perpendicular to each other. This is where you start laying your tile. If these lines aren't 90 degrees, then you may have measured incorrectly.
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
144/2.25=64. 18x18 tile cover 2.25 sq ft area.
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?
30 but get 4 extra in case you break some
256 tiles
80 if the tiles are 12x12 - 12x12 is one square foot covering 80 you would need 80 tiles
144
650
168
The tile is bigger than the area that you want to cover (12x12 > 10x11) so one tile will do. <><><><><> However, if you meant 12x12 INCH tiles, and a 10x11 FOOT room, you would need 110 tiles.
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
123 will cover it. Get extras.
A 12x12 tile is 1 sq foot, so you will need 198 tiles.
You need 0.52, so about a half.because a single 12x12 tile has an area of 144.
100 + 3%waste for cuts = 103.