Calculating Truth

Compare 1 gallon (128 fl oz) milk and water jugs against half-gallon (64 fl oz) cartons.
Half Gallon Carton
64floz
$2.69
1 Gallon Jug
128floz
$4.29
Buying 1 gallon saves $1.09 compared to buying two half-gallons (20.3% savings).
Dairy and beverage producers offer their steepest consumer discounts on 1-gallon plastic jugs due to automated blow-molding and distribution efficiency.
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Launch Interactive Unit Compare →One US liquid gallon equals exactly 128 fluid ounces (fl oz), and a half gallon equals 64 fluid ounces.