There are 8 cups in half of one U.S. gallon. This means that a half gallon is also equivalent to 2 quarts. In the U.S., milk and other liquids are often sold in standard halfgallon or gallon jugs.
Another gallon measurement is the dry gallon, which is used mostly in America. One dry gallon equals around 1.16 U.S. gallons, and therefore a half of a dry gallon equals around 9.3 cups.
The British have a measurement called the imperial gallon, which is quite different from the American gallon. One imperial gallon equals roughly 1.20 U.S. gallons, and therefore onehalf of an imperial gallon equals about 9.6 U.S. cups.
0.12 half gallon.
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There are 8 cups in one half gallon. There are 16 cups in a gallon. ChaCha again
http://www.chacha.com/question/howmanycupsina...

There are 16 cups in one gallon, so, divided in half, there would be 8 total cups in one gallon!
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Basically depends how big a cup we are talking about. If its any help,half a gallon is 4 pints.
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