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What is a US Gallon?

Volume Unit

Definition

A US gallon is a unit of volume equal to 3.785 liters or 128 US fluid ounces. It is smaller than an Imperial gallon.

History

The US gallon is based on the English wine gallon, which was defined in 1707. When the UK adopted the Imperial gallon in 1824, the US kept the older wine gallon standard.

Common Uses

  • Fuel sales in the United States
  • Milk and beverage containers
  • Pool and aquarium volumes
  • Paint and chemical containers

Fun Facts

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A US gallon is about 83% of an Imperial gallon

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The average American uses about 80-100 gallons of water per day

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There are 4 quarts or 8 pints in a gallon

All US Gallon Conversions