The best way to figure out how many 13x13 tile will be needed to cover 30 sf of floor is to calculate 13x13/144 give coverage per tile (1.1736), then take 30/1.736 = 25.56 tiles.
6' x 9' (54 square feet) = 6 square yards of tiles needed.
240 square tiles are needed
236 18-inch tiles.
Each tile covers 4 square feet. Which means you need 200 tiles to cover 800 square feet, plus spoilage.
616 3x6 inch tiles are needed to cover exactly 77 square feet.
157 18 by 18 tiles are needed to cover 352 square feet.
6' x 9' (54 square feet) = 6 square yards of tiles needed.
240 square tiles are needed
5,184 2-square-inch tiles are needed.
236 18-inch tiles.
1540
Each tile covers 4 square feet. Which means you need 200 tiles to cover 800 square feet, plus spoilage.
647
968
18..
616 3x6 inch tiles are needed to cover exactly 77 square feet.
216- 2x2