Volume
fluid ounces to gallons Converter
1 fl oz = 0.007813 gal. Enter any value and the result updates instantly.
Convert
Accuracy and rounding
For U.S. liquid measures when small volumes roll up to gallons.
Metric volume units are fixed, and cups, teaspoons, tablespoons, pints, quarts, and gallons use U.S. liquid measures unless imperial is named.
For recipes, round to the nearest useful spoon, cup, or milliliter. For containers and dosing, keep more precision in gallons.
How to convert fluid ounces to gallons
- Type the fluid ounces value in the calculator.
- Keep fluid ounces selected as the from unit and gallons selected as the to unit.
- Use the instant result, or copy it with the copy button.
fluid ounces to gallons chart
| fluid ounces | gallons |
|---|---|
| 1 fl oz | 0.007813 gal |
| 5 fl oz | 0.03906 gal |
| 10 fl oz | 0.07813 gal |
| 50 fl oz | 0.39063 gal |
| 100 fl oz | 0.78125 gal |
| 128 fl oz | 1 gal |
Formula
gal = fl oz x 0.0078125
Example: 1 fl oz = 0.007813 gal.
Source
Liter, cubic meter, and U.S. customary liquid measure relationships.
Common questions
How do I convert fluid ounces to gallons?
Enter the fluid ounces value in the converter, or multiply by the factor shown in the formula. 1 fl oz = 0.007813 gal.
What should I watch out for?
U.S. liquid units are used for cups, teaspoons, tablespoons, pints, quarts, and gallons unless the page says imperial.
Where does this volume conversion come from?
Liter, cubic meter, and U.S. customary liquid measure relationships. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.