quart (US) [qt (US)] Unit Converter

Definition of quart (US) [qt (US)] unit

A US liquid quart is a customary unit of volume equal to one-fourth of a US gallon, or 32 US fluid ounces. It measures approximately 0.946 liters and is commonly used for liquids in household and commercial contexts.

History of quart (US) [qt (US)] unit

The quart developed from English measurement traditions, where it represented a quarter of a gallon. After independence, the United States retained customary measures but defined its own gallon based on the English wine gallon. Consequently, the US liquid quart became one-fourth of 231 cubic inches, while the British Imperial quart followed a different standard. In 1893, the Mendenhall Order linked customary volume units to metric values, establishing the quart at approximately 0.946352946 liters. It remains customary rather than SI, and its distinction from the Imperial quart matters in modern measurement.

Applications of quart (US) [qt (US)] unit

Today, the US liquid quart appears on milk, cream, juice, and other beverage containers, as well as paint and automotive-fluid packaging. Recipes commonly call for quarts of stock, soup, or ice cream. In commerce, suppliers and consumers use it for retail and bulk liquid quantities, although liters and milliliters are increasingly preferred in scientific and international settings.

Complete list of quart (US) [qt (US)] unit conversion