imp gal

What is a Imperial Gallon?

Volume Unit

Definition

An imperial gallon is a unit of volume equal to 4.546 liters or approximately 1.2 US gallons.

History

The imperial gallon was defined by the British Weights and Measures Act of 1824. It was based on the volume of 10 pounds of water at a specific temperature.

Common Uses

  • Fuel sales in the UK (historically)
  • Some Commonwealth countries
  • Brewing and distilling
  • Historical documents

Fun Facts

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An imperial gallon is about 20% larger than a US gallon

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The UK switched to selling fuel in liters in the 1980s

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An imperial pint is larger than a US pint

All Imperial Gallon Conversions