4.074 cubic yards for every foot the slab is thick.
0.3086 for every inch of thickness
It depends on the thickness of slab. A yard of cement contains 9 cubic feet. Thus, it would cover 9 square feet if the slab was 1 foot thick. For a 4 inch thick slab, it would cover 3 times as much area, or 27 square feet.
You can't express a volume of concrete in yards.
It depends on how deep it is. If it is 6 inches deep, you will need 77 yards.
2,000,000,000,000,000,000,000,000,000,000,000,000 sacks
18x32 feet by 4 inches thick: 7.1 cubic yards. For a 6-inch slab, 10.7 cubic yards.
You need to supply the thickness of the slab in order to calculate this. If it was a 6" inch thick slab (0.5 feet), then the formula would be 2 x 76 x 0.5, all divided by 27 = 2.81 cubic yards.
A 22x22 foot slab at a 4-inch thickness/depth requires a minimum of 6 cubic yards.
The answer will depend on 4 inch slab of what material!
At least 3 cubic yards for a 4-inch slab. You'll need 4.75 cubic yards for a 6-inch slab.
For a 4-inch thick slab you will need at least 1.2 cubic yards.
1.25 cubic yards for a 4-inch slab. 2 cubic yards (1.85) for a 6-inch slab.
A two-inch slab is fundamentally unsound because it's not thick enough. So...go with at least a three inch slab. For a 16-foot x 14-foot x 3-inch slab: The slab is 224 square feet. Divide by four and you get 56 cubic feet. Add 10 percent (because the bottom isn't flat) and you come up with 61.6 cubic feet. There are 0.6 cubic feet in an 80-pound bag, so you need 103 bags. Do not do it this way. It will cost you more money and the pour will be weak and look terrible. You need 2-1/2 yards of concrete from a concrete company. If you make the slab 4 inches thick, you will need 3 yards and that's better because concrete companies don't like to deal in half-yard increments.
A 14'x14'x4" inch slab will require 2.42 cubic yards of cement.
4.074 cubic yards for every foot the slab is thick.
For a 4-inch depth you will need 7.41 cubic yards.