Each 17"x17" tile will cover 17/12 x 17/12 sq ft = 2.0069 sq ft
Then covering 255 sq ft will require 255/2.0069 = 127.06 = 128 tiles.
This number assumes that the shape is well-behaved (there are no wriggly edges or narrow left-over bits). that there are no breakages and that most off-cuts are used. In real life, therefore, you should allow at least 5% for wastage.
576 feet x 12 inches in a foot = 6912 inches 6912 inches/18 inches per tile = 384 tiles
12" x 12" = 1 square foot. 400 of them are required in order to cover 400 square feet.
A 6 ft * 12 ft tile will cover 72 square feet.
A 4 inch by 4 inch tile is 16 square inches. 60 square feet is 8640 square inches. Dividing the one by the other shows us that 540 tiles 4 inches on a side will cover an area of 60 square feet.
It's likely that your tile is 12 x 12 inches and 70 of them would cover 70 square feet. If in fact your tile is 12 x 12 feet, one of them would be more than twice the size of the available area.
Each tile covers 81 square inches. You have 1,296 square inches to cover. It will take 16 tiles to cover that area.
Let us look at a tile. It is 12 inches by 12 inches. There are 12 inches in a foot. So each tile is one square foot. That would mean 110 square feet.
It depends on the units used for 17x17: inches, centimetres?
576 feet x 12 inches in a foot = 6912 inches 6912 inches/18 inches per tile = 384 tiles
Each tile covers 336 square inches. You have 62,208 square inches to cover. You will need 185.1 tiles, plus extra for damage and shaping.
12" x 12" = 1 square foot. 400 of them are required in order to cover 400 square feet.
A 6 ft * 12 ft tile will cover 72 square feet.
18 what cms or inches?? Probably inches so, Inches: 115.555556 tiles so about 116 tiles needed
One tile of size 13' by 13' will cover 169 square feet and so will be more than sufficient.
If the tiles are 12 inches x 12 inches then they measure 1 square foot. So, you would need 35 of them to cover an area of 35 square feet.
A 4 inch by 4 inch tile is 16 square inches. 60 square feet is 8640 square inches. Dividing the one by the other shows us that 540 tiles 4 inches on a side will cover an area of 60 square feet.
A 24" by 18" tile is 432 square inches or three square feet.