How to convert fluid ounces to gallons
Formula: gal = fl oz ÷ 128
Worked example: 12 fl oz → 12 ÷ 128 = 0.09375 gal
Fluid ounces to gallons conversion chart
| Fluid ounces (fl oz) | Gallons (gal) |
|---|---|
| 1 fl oz | 0.0078125 gal |
| 2 fl oz | 0.015625 gal |
| 3 fl oz | 0.0234375 gal |
| 4 fl oz | 0.03125 gal |
| 5 fl oz | 0.0390625 gal |
| 6 fl oz | 0.046875 gal |
| 7 fl oz | 0.0546875 gal |
| 8 fl oz | 0.0625 gal |
| 9 fl oz | 0.0703125 gal |
| 10 fl oz | 0.078125 gal |
| 12 fl oz | 0.09375 gal |
| 15 fl oz | 0.117188 gal |
| 20 fl oz | 0.15625 gal |
| 25 fl oz | 0.195313 gal |
| 30 fl oz | 0.234375 gal |
| 40 fl oz | 0.3125 gal |
| 50 fl oz | 0.390625 gal |
| 75 fl oz | 0.585938 gal |
| 100 fl oz | 0.78125 gal |
| 250 fl oz | 1.95313 gal |
| 500 fl oz | 3.90625 gal |
| 1,000 fl oz | 7.8125 gal |
What is a fluid ounce?
The US fluid ounce is 1/128 of a US gallon, about 29.57 ml. It measures drinks and liquid ingredients: a soda can holds 12 fl oz. It is a volume, unlike the ounce on a scale, and slightly larger than the imperial fluid ounce.
What is a gallon?
The US gallon is defined as 231 cubic inches, exactly 3.785411784 liters, and holds 4 quarts or 128 fluid ounces. Gasoline, milk, paint and water use in the United States are measured in gallons.