The quart (symbol: qt)
Name
The term comes from the
Latin quartus]] (meaning one-quarter) via the
French language 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]],
while 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
Imperial quart
The imperial quart is equal to one-quarter of an imperial gallon of exactly , i.e. . In the United Kingdom, goods may be sold by the quart if the equivalent metric measure is also given.
|
| ≡ | imperial gallon |
| ≡ | imperial pints |
| ≡ | imperial gills |
| ≡ | imperial fluid ounces |
| ≡ | liters |
| ≈ | cubic inches |
| ≈ | US gallons |
| ≈ | US liquid quarts |
| ≈ | US liquid pints |
| ≈ | US gills |
| ≈ | US fluid ounces |
| ≈ | US dry quarts |
| ≈ | US dry pints |
In Canadian French, by federal law, the imperial quart is called pinte.
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 0.9144 meters: from this definition the metric equivalents for inches, feet, miles, area measures, and measures of volume are determined. The US liquid quart is equal to one-quarter of a gallon of exactly 231
cubic inches, i.e. 57.75 cubic inches or .
[ "Authorized tables" , United States Code, Title 15, ch. 6, subchapter I, sec. 205, accessed 19 July 2008.]|
| ≡ | US gallon |
| ≡ | US liquid |
| ≡ | US cups |
| ≡ | US gills |
| ≡ | US |
| ≡ | liters[ Guide for the Use of the International System of Units (SI) —US government publication][This has been the exact conversion since the 1964 redefinition of the liter and the 1959 redefinition of the inch.] |
| ≡ | [One US gallon is defined as exactly 231 cubic inches.] |
| ≈ | imperial gallons |
| ≈ | imperial quarts |
| ≈ | imperial pints |
| ≈ | imperial gills |
| ≈ | imperial fluid ounces |
| ≡ | US dry quart |
| ≡ | US dry pints |
|
US dry quart
In the United States, the
dry measure quart is equal to of a US bushel of exactly 2150.42 cubic inches, i.e. 67.200625 cubic inches or .
|
| ≡ | US bushel |
| ≡ | US peck
|
| ≡ | US dry pints |
| ≡ | liters |
| ≡ | cubic inches |
| ≡ | US gallon |
| ≡ | US liquid quarts |
| ≡ | US liquid pints |
| ≡ | US gills |
| ≡ | US fluid ounces |
| ≈ | imperial gallons |
| ≈ | imperial quarts |
| ≈ | imperial pints |
| ≈ | imperial gills |
| ≈ | imperial fluid ounces |
|
Winchester quart
The Winchester quart is an obsolescent measure:
[ Trading Standards – Weights and Measures of the City of Winchester ] it was originally equal to two imperial quarts (half of an imperial gallon) or exactly , but was later metricated to (2.2 imperial quarts). Despite its name, it is unrelated to the Winchester measure.
The 2.5L bottles in which laboratory chemicals are supplied are sometimes referred to as Winchester quart bottles, although these contain 10% more than a traditional Winchester quart.
Reputed quart
The reputed quart was a measure equal to two-thirds of an imperial quart (one-sixth of an imperial gallon), or exactly 0.757681 liters, which is only 0.08% larger than one US fifth (exactly 0.7570823568 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
External links
