The pint is an English unit of volume or capacity in the imperial system and United States customary units. The imperial version is 20 imperial fluid ounces and is equivalent to 568.26 mL, while the U.S. version is 16 U.S. fluid ounces and is equivalent to 473 mL. Pints are commonly abbreviated as either "p" or "pt".
As with other measurement units used in the imperial system and USA, the pint used to be a common measure throughout Europe (differing in exact value from country to country) but was replaced in much of Europe with the metric system during the nineteenth century. One US fluid pint of water weighs approximately one pound, resulting in the popular saying, “The pint’s a pound, the world around.” The saying is only approximately correct, since 1 US pint weighs 1.04375 pounds, and does not apply the world around, since the imperial pint used in Britain and its former colonies weighs 1.25 pounds. A different, but equally useful saying for the imperial pint is “A pint of water weighs a pound and a quarter.”