If you're talking about ounces of weight, that depends on what substance
is in the 40 cubic feet, and what planet it's on.
If you're talking about fluid ounces, then it's about 38,300 of them. (rounded)
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.
10,800 cubic feet
5x4x2=40 cubic feet
40 feet x 7 feet x 7 feet = 1960 cubic feet.
40 cubic feet = 299.2 US gallons.
40 square feet
40 cubic feet.