There are 4 cups in a U.S. liquid quart. The U.S. quart was standardized as a unit of measurement in 1959 by an international pound and yard agreement. The quart measures about 20 percent less than the imperial quart, which is used in the United Kingdom.
A U.S. quart equals 1/4 gallon and contains 2 pints or 32 ounces. There are 33 ounces in the imperial quart. In metric measurement, it equals 0.95 liter. By cubic inches, the volume of a quart is 57.75 cubic inches. The word "quart" originates from the Old French use of "quarte," meaning "four" and from the Latin "quarta pars," meaning "four parts."