About 1/2 cubic yard will be enough.
1.25 cubic yards for a 4-inch slab. 2 cubic yards (1.85) for a 6-inch slab.
800lbs
For a 4-inch thick slab you will need at least 1.2 cubic yards.
10-ft x 30-ft x 4-in = 100 cubic ft.That slab weighs 3.7 times as much as 1 "yard" of concrete. (rounded)
The recommended thickness for a driveway concrete slab is typically 4 inches.
3.16 Cubic Yards
128
To calculate the volume of a concrete slab, multiply the length, width, and depth. For a 10 x 12 x 4 slab, the volume is 10 feet × 12 feet × 4 feet = 480 cubic feet. Since concrete is typically sold by the cubic yard, convert cubic feet to cubic yards by dividing by 27. Therefore, you will need approximately 17.78 cubic yards of concrete for the slab.
A 10-foot round slab at 4 inches requires 1 cubic yard.
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 depth you will need at least 7 cubic yards.
22 cubic yards