2.37 cubic yards of stone for every 3 inches deep it needs to be
The 4 inches is 4/12 of a foot or 1/3 foot. Length times width times height is the volume, so 2856 (the area in square feet) times 1/3 (the depth in feet) = 952 cubic feet.
Any reason why it shouldn't be 220, apart from the shape of the area?
To cover a 30x30 area, which has an area of 900 square feet, you would need to determine the area of one 12x12 stepping stone, which is 1 square foot (12 inches x 12 inches = 144 square inches, or 1 square foot). Therefore, you would need 900 stepping stones to cover the entire 30x30 area.
A 12x12 tile covers 1 square foot (since 12 inches = 1 foot). To cover a 144 square foot area, you would need 144 tiles, as each tile covers 1 square foot. Therefore, you need a total of 144 tiles to completely cover the area.
Technically, none. A square foot is a measure of area whereas it is the volume of water that is required. To convert from area to volume it is necessary to know the depth. A twelfth of a cubic foot will cover an area of one square foot to a depth of 1 inch. A cubic foot will cover it to a depth of 1 foot, 100 cubic feet will cover it to a depth of 100 feet.
You will need 1500 cubic feet.
Take the sq foot and divide by 140 if you want the stone apx. 2" deep.
To cover an area of 1 square foot with 1/2 inch of water, you would need 0.623 gallons of water.
The 4 inches is 4/12 of a foot or 1/3 foot. Length times width times height is the volume, so 2856 (the area in square feet) times 1/3 (the depth in feet) = 952 cubic feet.
Any reason why it shouldn't be 220, apart from the shape of the area?
A square foot will cover a square foot, regardless of the depth of the material the cover is made of.
640
It should take about 825 1 foot square tiles to cover a floor with those dimensions. This assumes roughly a 10% waste factor.
1
144
To determine how many 12x12 tiles are needed for a 54 square foot area, first calculate the area of one tile. A 12x12 tile is 1 square foot (since 12 inches is 1 foot). Therefore, to cover 54 square feet, you would need 54 tiles, as each tile covers exactly 1 square foot.
If it is then find out where to get it and then get it!