80 fluid ounces equates to 0.625 gallons. (US)
You must mean fluid ounces (ounces are weights, fluid ounces are volumes). There are 80 fluid ounces in a UK half gallon. There are 63.999999 US fluid ounces in a US half gallon.
128 ounces in a gallon... so....80 US fluid ounces = 0.625 US gallons
80 US fluid ounces = 0.625 US gallons
There are 64 fluid ounces (1/2 gallon) in two quarts. (US). In UK measures it is 80 fluid ounces.
80 US fluid ounces is about 2,365.9 mL.
80 fluid ounces (8 fl. ounces per cup).
That is 1.25 cups.
80 fluid ounces is 0.625 gallons.
192 fl.oz., algebraic steps below: 1.5 gal*128 fl.oz. 1 gal=192 fl.oz.
One half quart plus one gallon is 80 fluid ounces.
80 US fluid ounces: 2.37 L 80 UK fluid ounces: 2.27 L
A quart is 32 fluid ounces, so 2 quarts are equal to 64 fluid ounces--or one-half gallon.