A gallon is a measure of volume, the inch is a measure of length, the two can not be equated.
However the cubic inch and the gallon can be equated, there are 231.00010000000003 cubic inches in one US Gallon.
Gallons is a unit of quantity, inch of length. They cannot be compared
There are 115.5 cubic inches in a half gallon.
277.4 cubic inches per UK gallon.
231 cubic inches per US gallon.
There are approximately 73,921 cubic inches in a 275 gallon cylinder.
Gallons is a liquid measurement and inches is a solid measurement so there is no such thing as inches in a gallon but there is square inches in a gallon which is completely diffrent. Cubic inches measure volume so a gallon would be measured in cubic inches rather than square inches. 231 cubic inches is equal to one gallon. Answer2 The first para in the above answer is confusing because it says "there is square inches in a gallon". Unfortunately, there are NOT square inches in a gallon - they are CUBIC inches (a measure of volume, not area)
One US gallon = 231 cubic inches.
1 US gallon is 231 cubic inches.
Each US gallon of water equates to a volume of 231 cubic inches.
277.03
24
You actually have a 20 gallon tank. There are 231 cubic inches in a gallon. So if you take your length times your with you get: 24x12 = 288in square. Then multiply that times the 16 inches of height and you get 4,608 inches cubed. Divide that number by the 231 cubic inches per gallon and you get: 4608 (inches cubed)/ 231(cubic inches per gallon)=19.94 Gallons or a 20 gallon tank.
One US gallon = 231 cubic inches.