One quart is equal to 32 fluid ounces. A quart is the equivalent of 2 pints, and each pint has 2 cups. One cup is equal to 8 fluid ounces. Therefore, 1 quart is equal to 4 cups, and 4 cups multiplied by 8 fluid ounces is 32 fluid ounces.
A quart is one-fourth of a gallon, which is easy to remember because "quart" is part of the word "quarter." A gallon is equal to 128 fluid ounces, since 32 multiplied by 4 is 128. A gallon is also equal to 8 pints or 16 cups.
One-half gallon or 2 quarts is equal to 64 ounces, which is the same as eight 8-ounce glasses, the often recommended amount of water a person should drink in a day.