None.
A cubic [whatever] is a measure of volume while a foot is a measure of distance. The two measure different things and it makes no sense to try to convert from one to the other.
A hole 40 inches deep by 12 inches wide has a volume of: 2.62 cubic feet.
40 cubic feet = 1.481 cubic yards.
1 US quart = 0.0334201389 cubic feet 40 quarts X 0.0334201389 quarts/cubic foot = 1.3 cubic feet
40 liters is the same as 1.41 cubic feet (rounded).
1 cubic yard = 27 cubic feet 1 cubic foot = 0.037 cubic yard (rounded)
Volume = 40*8*8.5 cubic feet = 2720 cubic feet
40 cubic feet equates to about 300 (299.221) US gallons of water.
1 cup = 0.25 quarts 64 cups x .25 = 16 quarts
10,800 cubic feet
One ton of coal is approximately equal to 40 cubic feet. Therefore, three tons of coal would require around 120 cubic feet of storage space.
5x4x2=40 cubic feet
40 feet x 7 feet x 7 feet = 1960 cubic feet.