What is volume?Volume is a measure of the amount of three-dimensional space occupied by an object. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces.
InputImperial Gallon is defined as exactly 4.54609 litres (277.4194 cubic inches). It is used in some Commonwealth countries.
US Dry Gallon is equal to exactly 268.8025 cubic inches, which is 4.40488377086 liters.