Quart

Quart
One-quart milk jugs (top shelf); half-gallon (two-quart) milk jugs (bottom shelf)
General information
Unit ofVolume
Symbolqt
Conversions (imperial)
1 imp qt in ...... is equal to ...
   SI-compatible units   1.13652 L
   US customary units   1.200950 US qt
   US customary units   69.35486 in3
Conversions (US)
1 US qt in ...... is equal to ...
   SI-compatible units   0.9463529 L
   Imperial units   0.8326742 imp qt
   Imperial units   57.75 in3
   US dry gallon   0.859367 US dry qt

The quart (symbol: qt) is a unit of volume equal to a quarter of a gallon. Three kinds of quarts are currently used: the liquid quart and dry quart of the US customary system and the imperial quart of the British imperial system. All are roughly equal to one liter. It is divided into two pints or (in the US) four cups. 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 (meaning one-quarter) via the French quart. 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.

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, 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 L.

1 US liquid quart  = 14 US liquid gallons
= 2 US liquid pints
= 4 US liquid cups
= 8 US liquid gills
= 32 US fluid ounces
= 57.75 cubic inches
0.946352946 liters
33.307 imperial fluid ounces

US dry quart

In the United States, the dry quart is equal to one quarter of a US dry gallon, or exactly 1.101220942715 L.

1 US dry quart  = 132 US bushels
= 18 US pecks
= 14 US dry gallons
= 2 US dry pints
= 67.200625 cubic inches
1.101220942715 liters
38.758 imperial fluid ounces

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.

1 imperial quart  = 14 imperial gallons
= 2 imperial pints
= 40 imperial fluid ounces
1.1365225 liters
69.355 cubic inches
38.430 US fluid ounces

In Canadian French, 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.


This page was last updated at 2024-04-16 11:05 UTC. Update now. View original page.

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