18..
157 18 by 18 tiles are needed to cover 352 square feet.
5,184 2-square-inch tiles are needed.
1540
647
216- 2x2
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
616 3x6 inch tiles are needed to cover exactly 77 square feet.
216- 2x2
Tiles that are two feet on a side cover 4 square feet. 378 of them cover 1512 square feet.