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Differences between the US and British customary systems

6 January, 2016 - 09:29

The United States uses US customary units, although most of them are identical to Imperial units. For some measurements, such as for liquid volume, both the USA and the UK use the fluid ounces as their units.

There are numerous examples of such discrepancies.

Discrepancies between US and British customary units

There are notable differences between US and British customary units in, for example, measures of volume. The US customary bushel and the US gallon, and their subdivisions differ from the corresponding British Imperial units as follows:

  • US fluid ounce = 1.041 British fluid ounces
  • British fluid ounce = 0.961 US fluid ounce
  • US gallon = 0.833 British Imperial gallon
  • British Imperial gallon = 1.201 US gallons.