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.
There are eight cups in a half gallon. There are sixteen cups in one gallon. Half of one gallon is a half gallon. That would make half of sixteen cups (1 gal) eight cups.
http://www.ask.com/webanswers/Reference/Other/how...

32 half cups. 1 gallon = 16 cups. 1 cup = 0.06 gallon.
http://wiki.answers.com/Q/How_many_half_cups_are_i...

There is 16 cups in a gallon, thus there is 8 cups in a half of gal...
http://www.chacha.com/question/howmanycupsaret...

There are 16 cups to a gallon. Extras: 1 gallon = 4 quarts. 1 quart = 2 pints. 1 pint = 2 cups.
http://www.quora.com/Howmanycupsareinagallon
