Fluid Ounces to Gallons Converter
Convert fluid ounces to gallons using the formula fl oz ÷ 128 = gal. The calculator below shows higher precision results. The reference table is rounded for readability.
This converter uses US customary fluid ounces and gallons. UK (imperial) fluid ounces and gallons are a different size.
Formula and Step-by-Step
Step-by-step: 1 fl oz to gal
- Start with 1 fl oz
- Divide by 128: 1 ÷ 128 = 0.007813
- Result: 1 fl oz = 0.007813 gal
Conversion Table
Common fluid ounces to gallons values. The table and calculator both use the same conversion formula shown above.
| Fluid Ounces (fl oz) | Gallons (gal) |
|---|---|
| 1 fl oz | 0.007813 gal |
| 2 fl oz | 0.0156 gal |
| 5 fl oz | 0.0391 gal |
| 10 fl oz | 0.0781 gal |
| 25 fl oz | 0.1953 gal |
| 50 fl oz | 0.3906 gal |
| 100 fl oz | 0.7813 gal |
| 250 fl oz | 1.95 gal |
| 500 fl oz | 3.91 gal |
| 1,000 fl oz | 7.81 gal |
What Are Fluid Ounces and Gallons?
What is a Fluid Ounce?
A US fluid ounce is a unit of volume equal to approximately 29.57 milliliters. A UK (imperial) fluid ounce is slightly smaller at 28.41 milliliters. This converter uses US fluid ounces.
What is a Gallon?
A US gallon is a unit of volume equal to approximately 3.785 liters. Note: a UK (imperial) gallon is larger at 4.546 liters. This converter uses US gallons.
Why convert fluid ounces to gallons?
People convert fluid ounces to gallons when working across different measurement systems.