Volume Unit Converter
Convert a volume between metric, US and imperial units. US and imperial measures share names but differ in size, so both are listed explicitly rather than one standing in for the other.
Convert a volume
Frequently Asked Questions
They are different volumes. A US gallon is 3.785 L; an imperial gallon is 4.546 L, about 20% larger. The same split applies to pints and fluid ounces.
3.785411784 L, exactly, since the US gallon is defined as 231 cubic inches.
29.5735 ml. An imperial fluid ounce is 28.4131 ml.
In the UK, the imperial pint, 568 ml. In the US, 473 ml. It is the largest everyday difference between the two systems.