Ok, one cubic foot equals 7.481 liquid gallons. so 4x6x5=120 cubic feet times 7.481. That equals... 897.72 liquid gallons.
That would depend on the size of the container.
A 72x72x24 foot container holds 930,696.3 gallons.
The capacity of the container is 56.727 gallons (rounded)
You would need a 3rd dimension to calculate a volume.
Assuming that the given dimensions are inches, it would be 112.2 gallons.
128
24,685.7 gallons.
= 93.09 gallons (US) = 77.51 gallons (imperial)
19.64 US gallons.
10.38961 gallons (rounded)
4.65 gallons
It will depend on what you are putting in it. Water weighs 8 lbs per gallon, so your container would hold 256 lbs of water. Dry materials will weigh less.