20"x16"x12"=3840 cubic inches. 1 gal of water has a volume of 231 cubic inches therefore the nominal/quoted/rated volume of water the tank will hold is 3840 divided by 231 which is just over 16.6 gallons of water. The tank will never hold that amount of water when keeping fish. At least 1 inch will be left empty at the top and if the tank is set up with plants lights etc an average of 2 inches will be taken up with gravel at the bottom. So 3 inches is a quarter of 12 (which is the depth of the tank) that is reducing the holding capacity of the tank by one quarter so 16.6 divided by 4 will give how much less water the tank will actually hold. That amount is 4.15 gallons. So the tank will actually hold 16.60 minus 4.15 gallons. Which leaves you with 12.45 gallons if it is a planted tank. Applying the basic rule of fishkeeping "1" of fish needs a minimum of 1 gallon of water, you will see that your tank can house a maximum of 12.5 inches of fish.
6,048 cubic feet (28 x 18 x 12 = 6,048) equates to about 45,242.2 US gallons of water.
this doesnt make sense. an inch is a unit of length, a gallon is a unit of volume.
A rectangle is a flat shape and can't hold any water. Unless you fold it up into a box, in which case it might. But then it depends how you fold up the rectangle.
what is the answer to my question plaese?
18.7 US gallons
you can measure it in liters or gallons
The height of 400 gallons of water would depend on the shape of the container. 400 US gallons has a volume of about 206,000 cubic inches, so if the inside of the container was about 59 inches square, it would also be about 59 inches high.
This size tub holds 249 US gallons of water.
This is 750 gallons per acre which equates to about 0.02762 inches of water per acre.
This aquarium can hold a maximum of 10 gallons of water.
21 inches of water in a round pool that is 27 feet 3 inches across is about 7,667 gallons.
A rough (high) estimate will use the volume of a rectangle. 155.42 US gallons
17 inches x 17.5 inches x 8.5 inches equates to a maximum water volume of about 10.95 US gallons or 1.464 cubic feet.
There are 17.66 gallons in 4,080 cubic inches of water.
About 7,100 gallons of water.
you can measure it in liters or gallons
489.76 gallons of water.
If 24 inches is the diameter, there are 141,004 gallons of water. If 24 inches is the radius, there are 564,018 gallons of water.
There are 25.71 gallons of water in 5,940 cubic inches.
If you don't know the calculation, then how about you just use a kitchen measuring jug to fill the barrel and then you will know exactly how much water you have in there.
4710 inches cubed equates to 20.4 (20.38961) US gallons of water.
4.5 US gallons of water displaces 1,040 cubic inches.