A pint is a unit of volume in both the imperial and United States customary measurement systems. In the United Kingdom, the imperial pint is approximately 568 mL, while in the United States, the liquid pint is approximately 473 mL and the dry pint is approximately 551 mL. The pint is traditionally one eighth of a gallon in both systems. The British imperial pint is about 20% larger than the American pint due to the different definitions of the two systems. The pint is still used in the US and UK as a measurement of volume, and it is still legal to use the pint as a supplementary unit in the UK. In summary, a pint is approximately 568 mL in the UK and 473 mL in the US.