Quarts

Quarts is the plural form of quart, a unit of volume used in the British Imperial and United States customary systems. A quart is one quarter of a gallon in its respective system, though the size differs between the systems: US liquid quart, US dry quart, and Imperial quart.

The US liquid quart equals 32 US fluid ounces, about 946.353 milliliters. It is defined as one fourth of a US liquid gallon and equals two US pints or four cups.

The US dry quart equals about 1.101 liters (1,101.221 milliliters). It is defined as one fourth of a US dry gallon and equals two US dry pints.

The Imperial quart equals about 1.136 liters (1,136.523 milliliters). It is defined as one fourth of an imperial gallon and equals two imperial pints; one imperial gallon is 4.54609 liters.

In common usage, one quart equals two pints in its respective system, and four cups in the US liquid system. The term qt is the standard abbreviation, with quarts used in cooking, food labeling, and some domestic measurements. Due to metric adoption, many countries now express volume in liters, but quarts remain in use in the United States, and to a lesser extent in the United Kingdom for traditional or historical contexts.