First, find the square footage of an 16" x 16" tile. 16 x 16 = 256 square inches. There are 144 square inches in a square foot (12" x 12" = 144). So divide 256 by 144 to get the square feet per tile. 324 / 144 = 1.78 sq ft per tile.
You have 270 square feet, using tiles that are 1.78 sq ft each. 270 / 1.78 = 151.7 tiles.
Generally, you will want to add from 5% to 10% for waste, depending on your layout (is it one big room, or several smaller rooms with lots of cutting?) (are you doing a checkerboard pattern, running bond (brick), or diagonal?) and your skill level. If in doubt, add 10% to be safe.
152 tiles + 10% --- that's 152 x 1.1 = 166.9 tiles.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
67 tiles.
76.6 tiles
How many 24x24 tiles it take to cover a 14×14 room
You will need at least 67 tiles. This will cover 150.75 square feet.
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.
192 tiles
67 tiles.
76.6 tiles
190
Two tiles will suffice since they will cover 36 square feet.
Since a 12x12 tile is one square foot, then 38 12x12 tiles will cover 38 square feet.
500/1.78 = 281 tiles
start with 38 tiles.
How many 24x24 tiles it take to cover a 14×14 room
Each tile covers 4 square feet. You will need 24.75 tiles to cover the area.
You will need at least 67 tiles. This will cover 150.75 square feet.