There are 128 ounces in a half gallon.

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There are 128 ounces in a half gallon.

Here's the breakdown:

- 1 gallon: 1 gallon is equal to 128 fluid ounces (fl oz). This is a standard conversion factor in the United States for measuring liquids.
- Half gallon: Since a half gallon represents half the quantity of a full gallon, we simply divide the volume of a full gallon by 2:

Half gallon = (1 gallon) / 2 = (128 fl oz) / 2 = 64 fl oz

Therefore, a half gallon is equivalent to 128 ounces.