quart

(qt)

   1. a traditional unit of volume, so-called because it equals exactly 1/4 (one quarter) of a gallon. However, there are several possible gallons to consider: in the U. S. customary measure system for liquid volumes (such as milk, for example), one quart is exactly 57.75 cubic inches, 32 fluid ounces, or approximately 0.946 3529 liters; [ii] in the U. S. customary measure system for dry volumes (pecans or strawberries, for example), one quart is 67.201 cubic inches, or approximately 1.101 221 liters; [iii] finally, in the British Imperial system, used for both liquid and dry commodities, one quart is 69.354 cubic inches, 40 fluid ounces, or exactly 1.136 5225 liters. In all cases, the quart equals 2 pints.

   2. a unit of volume, smaller than the standard quart¹, used for measuring wine. Wine bottles have often been called "quarts," although they were smaller than standard quarts. In the U.S., wine was often measured by the champagne quart, which contains only 26 U.S. fluid ounces instead of 32. This is equivalent to about 46.92 cubic inches or approximately 768.912 milliliters. In Britain, wine was sold by the reputed quart. Following the establishment of Imperial measure, the reputed quart was fixed at 2/3 Imperial quart, which is equivalent to 1/6 Imperial gallon, exactly 26 2/3 fluid ounces, about 46.24 cubic inches, or 757.682 milliliters (this is nearly identical to the U.S. fifth). These measures have mostly disappeared in favor of the international wine bottle, which contains exactly 750 milliliters.

   3. a traditional unit of [i]volume in Scotland equal to 2 Scots pints. This is almost exactly 3 British Imperial quarts, 3.6 U.S. liquid quarts, or 3.41 liters.