Gallon (US)

Definition

The US gallon is a unit of volume used in the United States customary system. It is defined as 3.78541 liters.

History

The term "gallon" dates back to the 14th century, originally used in England. The US gallon was established in 1824, based on the British wine gallon, which was set at 231 cubic inches. In 1976, the US adopted the metric definition of the gallon, aligning it with 3.78541 liters.

Uses

The US gallon is commonly used in everyday life for measuring liquid volumes, such as gasoline, milk, and water. It is also used in cooking and food service. In science and engineering, it is often employed for fluid measurement in the US.

Conversions

  • 1 US gallon = 3.78541 liters
  • 1 US gallon = 128 fluid ounces
  • 1 US gallon = 4 quarts

Fun Facts

  • The US gallon is different from the UK gallon, which is approximately 4.54609 liters.
  • A common misconception is that the gallon is universally defined; in fact, regional variations exist.
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