Imperial to Metric Volume Chart
In 1824, the various different gallons in use in the British Empire were replaced by the imperial gallon, a unit close in volume to the ale gallon.
It was originally defined as the volume of 10 pounds (4.5 kg) of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury (102 kPa) at a temperature of 62 °F (17 °C). In 1963, the gallon was redefined as the volume of 10 pounds of distilled water of density 0.998859 g/mL weighed in air of density 0.001217 g/mLagainst weights of density 8.136 g/mL, which works out to 4.546096 L or 277.4198 cu in.
The Weights and Measures Act of 1985 switched to a gallon of exactly 4.54609 L (approximately 277.4194 cu in).
Table of volume units
|Unit||Imperial ounce||Imperial pint||Millilitres||Cubic inches||US ounces||US pints|
|fluid ounce (fl oz)||1||1/20||28.4130625||1.7339||0.96076||0.060047|
Note: The millilitre equivalences are exact, but cubic-inch and US measures are correct to 5 significant figures.