The quart (symbol: qt) is an English unit of volume equal to a quarter gallon. Three kinds of quarts are currently used: the liquid quart and dry quart of the US customary system and the of the

British imperial system The imperial system of units, imperial system or imperial units (also known as British Imperial or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed thro ...

. All are roughly equal to one

liter The litre (international spelling) or liter (American English spelling) (SI symbols L and l, other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm3), 1000 cubic centimetres (cm3) or 0.001 cubic metre (m3). ...

. It is divided into two pints or (in the US) four

cup A cup is an open-top used to hold hot or cold liquids for pouring or drinking; while mainly used for drinking, it also can be used to store solids for pouring (e.g., sugar, flour, grains, salt). Cups may be made of glass, metal, china, clay, ...

s. Historically, the exact size of the quart has varied with the different values of gallons over time and in reference to different commodities.

Name

The term comes from the Latin ''

quartus Quartus ( el, Κούαρτος, Kouartos) was an early Christian who is mentioned in the Bible. According to church tradition, he is known as Quartus of Berytus and is numbered among the Seventy Disciples. Furthermore, he was Bishop of Beirut ...

'' (meaning one-quarter) via the

French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...

'' quart''. However, although the French word '' quart'' has the same root, it frequently means something entirely different. In

Canadian French Canadian French (french: français canadien) is the French language as it is spoken in Canada. It includes Varieties of French#Canada, multiple varieties, the most prominent of which is Quebec French, Québécois (Quebec French). Formerly ''Can ...

in particular, the quart is called '' pinte'', whilst the pint is called ''

chopine A chopine is a type of women's platform shoe that was popular in the 15th, 16th and 17th centuries. Chopines were originally used as a patten, clog, or overshoe to protect the shoes and dress from mud and street soil. Chopines were popular ...

''.

History

Since gallons of various sizes have historically been in use, the corresponding quarts have also existed with various sizes.

Definitions and equivalencies

US liquid quart

In the United States, all traditional length and volume measures have been legally standardized for commerce by the international yard and pound agreement of 1959, using the definition of 1 yard being exactly equal to 0.9144 meters. From this definition is derived the metric equivalencies for inches, feet, and miles, area measures, and measures of volume. The US liquid quart equals 57.75 cubic inches, which is exactly equal to 0.946352946 liters."Authorized tables"
,

United States Code In the law of the United States, the Code of Laws of the United States of America (variously abbreviated to Code of Laws of the United States, United States Code, U.S. Code, U.S.C., or USC) is the official compilation and codification of the ...

, Title 15, ch. 6, subchapter I, sec. 205, accessed 19 July 2008.

US dry quart

In the United States, the

dry Dry or dryness most often refers to: * Lack of rainfall, which may refer to ** Arid regions ** Drought * Dry or dry area, relating to legal prohibition of selling, serving, or imbibing alcoholic beverages * Dry humor, deadpan * Dryness (medica ...

quart is equal to one quarter of a US dry gallon, or exactly 1.101220942715 liters.

Imperial quart

The imperial quart, which is used for both liquid and dry capacity, is equal to one quarter of an imperial gallon, or exactly 1.1365225 liters. In the United Kingdom goods may be sold by the quart if the equivalent metric measure is also given. In French Canada, by federal law, the imperial quart is called pinte.

Winchester quart

The Winchester quart is an archaic measure, roughly equal to 2 imperial quarts or 2.25 liters. The 2.5L 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.

Reputed quart

The reputed quart was a measure equal to two-thirds of an imperial quart (or one-sixth of an imperial gallon), at about 0.7577liters, which is very close to one US fifth (0.757 liters). The reputed quart was previously recognized as a standard size of wine bottle in the United Kingdom, and is only about 1% larger than the current standard wine bottle of 0.75L.

Notes

References

External links

* * {{United States Customary Units Alcohol measurement Cooking weights and measures Customary units of measurement in the United States Imperial units Units of volume