Comparison of the imperial and US customary measurement systems adopted a system based on the 231-cubic-inch wine gallon for all fluid purposes. This became the US fluid gallon. Both the imperial and US fluid gallon are divided into 4 quarts, 8 pints or 32 gills. However, whereas the US gill is divided into 4 US fluid ounces, the imperial gill is divided into 5 imperial fluid ounces. So whilst the imperial gallon, quart, pint and gill are about 20% larger than their US fluid measure counterparts, the fluid ounce is about 4% smaller. Note that one avoirdupois ounce of water has an approximate volume of one imperial fluid ounce
Pint is still in limited use in parts of France, where "une pinte" means an imperial quart, which is 2 imperial pints, whereas a pint is "une chopine"—and Central Europe, notably some areas of Germany and Switzerland, where "ein Schoppen" is colloquially used for roughly half a litre. In Spanish holiday resorts frequented by British tourists, 'pint' is often taken to mean a beer glass (especially a dimple mug). Half-pint and pint mugs may therefore be referred to as "pinta pequeña" ('small pint') and "pinta grande" ('large pint'). "Pint" comes from the Old French word "pinte" and perhaps ultimately from Vulgar