To convert US gallons to US fluid ounces, multiply the value by 128. To go the other way, multiply US fluid ounces by 0.0078125 to get US gallons.
| US Gallons (gal) | US Fluid Ounces (fl oz) |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 5 gal | 640 fl oz |
| 10 gal | 1,280 fl oz |
| 20 gal | 2,560 fl oz |
| 50 gal | 6,400 fl oz |
| 100 gal | 12,800 fl oz |
| 500 gal | 64,000 fl oz |
| 1,000 gal | 128,000 fl oz |
US gallon (gal). The US liquid gallon is 231 cubic inches, exactly 3.785411784 liters.
US fluid ounce (fl oz). A US fluid ounce is 29.5735 mL, the unit on American drink and food labels.
There are 128 US fluid ounces in one US gallon.
Multiply the number of US gallons by 128. For example, 10 US gallons equal 1,280 US fluid ounces.
One US fluid ounce equals 0.0078125 US gallons.