Definition: A gallon is a unit of volume specifically regarding liquid capacity in both the US customary and imperial systems of measurement. The US gallon is defined as 231 cubic inches (3.785 liters).

A gallon is a customary unit for measuring liquid volume and liquid capacity. Learn more about the unit with examples and fun facts!

The meaning of GALLON is a unit of liquid capacity equal to 231 cubic inches or four quarts.

What exactly is a gallon? A gallon is a measure of volume primaririly used in the USA. Most commonly a gallon refers to a US gallon but there are two other gallons out there: imperial gallon - used in the UK and dry gallon mostly used in agriculture (for grapes, apples, berries, etc.)

Gasoline is often sold in terms of cost per gallon (or cost per liter in other parts of the world) in bulk through a gasoline pump, or sometimes in smaller amounts in containers. Below is an example of a gasoline can, sold in various measures of a gallon, often between 1.5-5 gallons.

A gallon is a unit of volume primarily used in the United States but also in some other countries. Traditionally used for measuring volumes of liquid substances like milk or gasoline.

Learn about gallons as a unit of volume, including US and Imperial measurements, with detailed conversion examples between gallons, pints, quarts, and cups. Includes step-by-step solutions for practical volume calculations.

In the United States, the only legal gallon is a unit of liquid capacity = 231 cubic inches = 3,785. 411 784 cubic centimeters. This is not the only gallon that has been used in the United States; for example, in the late 19ᵗʰ century some states had a 282-cubic-inch “milk gallon.”