The quart is an imperial and US customary unit of volume equal to a quarter of a gallon, two pints, or four cups. 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 litre.
Definitions and Equivalencies[]
- All U.S. length and volume measures are based upon the legal definition of 1 yard as exactly 0.9144 metres. From this is derived the equivalencies for inches, feet, and miles, as well as area measures and measures of volume. The US liquid quart exactly equals 57.75 cubic inches, which is exactly equal to 0.946352946 litres.
- United States liquid quart
1 US liquid quart = 1/4 US liquid gallons = 2 US liquid pints = 4 US liquid cups = 32 US fluid ounces = 57.75 cubic inches = 0.946352946 litres ≈ 33.307 imperial fluid ounces
- The US dry quart is equal to 1/32 of a US bushel, exactly 1.101220942715 litres.
- United States dry quart
1 US dry quart = 1/32 US bushels = 1/4 US dry gallons = 2 US dry pints = 67.2 cubic inches = 1.101220942715 litres ≈ 38.758 imperial fluid ounces
- The imperial quart, used for both liquid or dry capacity, is equal to one quarter of an imperial gallon, or exactly 1.1365225 litres.
- Imperial quart
1 imperial quart = 1/4 imperial gallons = 2 imperial pints = 40 imperial fluid ounces = 1.1365225 litres = 69.355 cubic inches = 38.430 US fluid ounces