There are 22 1/2 gallons in a 3' x 1' x 1' container.
You need to tell us how HIGH the tank is !
A 60x20x20-inch fish tank holds 104 gallons.
The tank will hold up to 90 (89.7662) gallons.
As a very rough estimate, I would suggest 40 gallons!
If this is a round tank, 15 feet wide and 7 feet tall, there would be 1237 gallons.
The capacity of the tank is 12.468 gallons (rounded) for each inch the tank is long.
Up to 224.4 gallons.
That is 185 US gallons.
There are 10.935 imp gallons in a tank measuring 1.08 feet x 0.75 feet by 2.16 feet.
For inches: 392.73 gallons For feet: 678,632.73 gallons.
About 29 gallons
Zero. For a tank to be able to hold anything, even water or air, it must be three dimensional, measured as cubic feet However, for 2 cubic feet, there are about 6.23 UK gallons in 1 cubic foot, hence about 12.45 UK gallons in 2 cubic feet.