More info needed. How much does 0.4 cubic feet of what weigh? Air? Lead? Water? Dirt?
2.5 cubic feet of water weighs about: 156 pounds.
10pounds
The weight of 2.25 cubic feet of water is approx 4495 pounds-force (lbf).
It depends on the density of the substance
Roughly 72 pounds.
Wood has a wide range of densities.
The weight of any volume of water will depend on the gravitational force acting upon it. 57 cubic feet of water would weigh nothing in a spaceship, for example.
Around one hundred pounds.
Wheat and soybeans: 1 bushel = 60 lb = 27.2155422 kg
A cubic foot of concrete weighs ABOUT 150 pounds. 4 feet by 12 feet by 4 feet is 192 cubic feet. If you meant 4 feet by 12 feet by 4 INCHES, that would be 16 cubic feet.
If the weight is 62.5, then it weighs 62.5