A square 20-inch tile is 2.78 square feet.
This tile has an area of 1 ft2.
1.78 sq feet per tile.
4,800 6-inch square tiles.
440 6-inch square tiles.
A 12 inch square tile covers a square foot. Doing the math gives an answer of 750 tiles.
67.5
2.25 square feet
288 6-inch tiles are needed.
There are 144 18 square inch tiles in an area of 18 square feet.
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.
2.007 sq ft