US fluid ounces to US gallons – US fluid ounce to US gallon Converter
1 fl oz = 0.0078125 gal
Formula
gal = fl oz × 0.0078125
US fluid ounces to US gallons conversion table
| US fluid ounces (fl oz) | US gallons (gal) |
|---|---|
| 0.5 fl oz | 0.00390625 gal |
| 1 fl oz | 0.0078125 gal |
| 2 fl oz | 0.015625 gal |
| 3 fl oz | 0.0234375 gal |
| 5 fl oz | 0.0390625 gal |
| 10 fl oz | 0.078125 gal |
| 20 fl oz | 0.15625 gal |
| 25 fl oz | 0.195313 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 |
| 1000 fl oz | 7.8125 gal |
| 5000 fl oz | 39.0625 gal |
US fluid ounces and US gallons are both volume units. One US fluid ounce equals 0.0078125 US gallons; enter any value above for an instant result, or use the table for common conversions.
Sanity-check examples
1 fl oz = 0.0078125 gal10 fl oz = 0.078125 gal100 fl oz = 0.78125 gal
Common pitfalls and look-alike units
Gallons differ: the US gallon ≈ 3.78541 L while the imperial gallon ≈ 4.546 L — about 20% apart, so check which one a recipe or fuel figure means. A US cup (~236.6 mL) is also not the metric 250 mL cup.
Frequently asked questions
How many US gallons are in a US fluid ounce?
1 US fluid ounce (fl oz) equals 0.0078125 US gallon (gal).
How do I convert US fluid ounces to US gallons?
Multiply the US fluid ounce value by 0.0078125 to get US gallon — for example, 2 US fluid ounces = 0.015625 US gallon.
How do I convert US gallons back to US fluid ounces?
1 US gallon equals 128 US fluid ounce. Use the swap button or the reverse conversion page linked on this page.