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How to Convert British Gallons to the United States Gallons

When using the gallon as a unit of measure, you must specify which type of gallon. British imperial gallons are the largest of the three units, but the American wet gallon and the American dry gallon are more commonly used today. The American wet gallon is the most common. To convert between the units, you need to know the conversion factors. Knowing which unit you are working with helps you accurately compare different volumes.

Calculator

Instructions

- 1
  Multiply the number of British imperial gallons by 1.20095 to convert to American liquid gallons. For example, if you have 10 British imperial gallons, multiply 10 by 1.20095 to get 12.0095 American liquid gallons.
- 2
  Multiply the number of British imperial gallons by 1.03206 to convert to American dry gallons. In this example, multiply 10 by 1.03206 to get 10.3206 American dry gallons.
- 3
  Check your answer using an online calculator (see Resources). Type in "gallons" and select whether you want to convert to American wet or dry gallons. Then enter the number of British imperial gallons and click "Go." The conversion will be displayed on the page.

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