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 16 ounce American traditional pint. Under the Canada Weights and Measures Act, if asked for a "pint of beer", businesses should serve customers 0.568 litres of beer with an accuracy of 0.5%, and if asked for a "pinte de bière" they should serve them 1.136 litres. The Imperial system of measurement is no longer taught in Canadian schools, which leads to confusion when customers ask how big a drinking establishment's pints are. Servers and even managers may not know. To avoid legal issues, many drinking establishments are moving away from using the term "pint" and are selling "glasses" or "sleeves"