The quart[1] is an imperial and US customaryunit of volume equal to a quarter of a gallon. Since gallons of various sizes have historically been in use, quarts of various sizes have also existed. Three of these quarts remain in current use, all approximately equal to one liter.
A Winchester quart is an archaic measure[7], roughly equal to 2 Imperial quarts or 2.25 litres. The 2.5 litre bottles, in which laboratory chemicals are supplied, are sometimes referred to as Winchester quart bottles although they contain slightly more than a traditional Winchester quart.
Maritimer English
In Maritimer English, a quart refers to a quantity of alcohol measuring approximately 750 mL, called a two-six (26 fluid ounces) in the rest of Canada. This is similar in size to the archaic british wine and spirits measure the "reputed quart", which is 2⁄3 imperial quart or ~757.7 ml[8]
Notes and references
^ The term comes from the Latinquartus (meaning one-quarter) via the Frenchquart. However, although the French word quart has the same root, it frequently means something entirely different. In Canadian French in particular, the quart is called pinte whilst the pint is called chopine.
^ One US liquid gallon is defined as 231 cubic inches.
^ ab This has been the exact conversion since the 1964 redefinition of the litre and the 1959 redefinition of the inch.