To calculate the volume of concrete needed for a slab that is 30 feet by 30 feet and 4 inches thick, first convert the thickness to feet: 4 inches is 1/3 of a foot. Then, multiply the dimensions: 30 ft x 30 ft x (1/3 ft) = 300 cubic feet. To convert cubic feet to cubic yards, divide by 27 (since there are 27 cubic feet in a cubic yard): 300 / 27 ≈ 11.11 cubic yards. Therefore, you will need approximately 11.11 yards of concrete.
11.852 cubic yards
At a poured depth of 4 inches, you will need 4.94 cubic yards.
If the slab is the standard 4" deep, you will need at least 8.89 cubic yards.
16 * 20 = 320 sq ft. at 4" thick concrete will cover 80 sq ft. 320 / 80 = 4 yards.
16 ft * 47 ft * 4 inches =16/3 yards * 47/3 yards * 4/36 yards = 9.3 yards approx.
how many yards of concrete will i need to do a 20 x20 x4 slab
10 yards
40.1 cubic yards
15 cubic yards
15 cubic yards
Volume = 11.85 Cubic Yards.
8.25 cubic yards of concrete
about 5 yards if your slab is 4" deep
11.852 cubic yards
At 4" thick you will need 1.23 cubic yards.
39.1116 cubic yards
9 x 4 =36 x .33 = 11.88 / 27 =.44 yards (4" thick)