US gallon (gal US)
The US gallon is used for fuel, beverages, household liquids, and American recipes.
History: the US gallon comes from older English trade measures, but its modern value differs from the imperial gallon.
Quickly convert US gallons to US fluid ounces without lookup tables or manual math.
This page is focused on converting US gallons to US fluid ounces. Type a number into the first field and the result appears immediately in the second field.
Example: 1 gal US = 128 fl oz US. Conversion formula: result = value × 0.003785411784 / 2.95735295625E-5.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The US gallon is used for fuel, beverages, household liquids, and American recipes.
History: the US gallon comes from older English trade measures, but its modern value differs from the imperial gallon.
The US fluid ounce is used for drinks, medicine, cosmetics, and recipes with small volumes.
History: the US fluid ounce grew out of apothecary and trade volume measures and differs from the imperial fluid ounce.
Enter a value in the US gallon field. The converter applies the formula "result = value × 0.003785411784 / 2.95735295625E-5" and immediately shows the result in US fluid ounces.
1 gal US = 128 fl oz US.
Yes. Use the swap button or choose the reverse pair from the full conversion list.