Approximately 96 square feet.
To determine how many 18x18 inch tiles you need for 56 square feet, first convert the tile size to square feet. An 18x18 inch tile is 1.5x1.5 feet, which equals 2.25 square feet per tile. Next, divide the total area needed (56 sq ft) by the area of one tile (2.25 sq ft): 56 ÷ 2.25 ≈ 24.89. Therefore, you will need 25 tiles to cover 56 square feet.
If you use a standard 4-inch depth, you will need at least 8.9 cubic yards.
Nine in each square foot. (27 times 9 equals 243).
For a 4-inch depth you will need 7.41 cubic yards.
1000
69
7.35 Is what you need
297 16x16-inch tiles.
125 16-inch tiles.
141
You'll need 200 18-inch tiles.
96
160
4,000 linear feet.
55 tiles
61 whole tiles represent 1421/3 square feet 144 square feet works out to 61.714 tiles (rounded)
You will need at least 67 tiles. This will cover 150.75 square feet.