To calculate the volume of a concrete slab that is 40 feet long, 60 feet wide, and 6 inches thick, first convert the thickness to feet (6 inches = 0.5 feet). The volume in cubic feet is 40 x 60 x 0.5 = 1,200 cubic feet. To convert cubic feet to cubic yards, divide by 27 (since there are 27 cubic feet in a cubic yard). Thus, 1,200 cubic feet is approximately 44.44 cubic yards.
37.03 yards
A 40x60x6in slab requires 44.44 cubic yards of cement.
about 5 yards if your slab is 4" deep
A 40'x40'x6" slab requires 29.63 cubic yards of cement.
25 Yards of concrete
how many yards of concrete will i need to do a 20 x20 x4 slab
37.03 yards
4.074 cubic yards for every foot the slab is thick.
A 40x60x6in slab requires 44.44 cubic yards of cement.
3.95 cubic yards of cement are needed for a slab that size.
about 5 yards if your slab is 4" deep
1.19 Cubic Yards
You can't express a volume of concrete in yards.
10.67 Cubic Yards
1.85 cubic yards.
About 24 cubic yards of cement is required for a slab that size.
A 40'x40'x6" slab requires 29.63 cubic yards of cement.