US gallon to US fluid ounce
1 US gallon equals 128 US fluid ounce, and 1 US fluid ounce equals 0.0078125 US gallon.
Conversion formula
fl oz (US) = gal (US) × 128
To convert US gallon to US fluid ounce, multiply the value by 128.
Conversion table
| 1 gal (US) | 128 fl oz (US) |
|---|---|
| 2 gal (US) | 256 fl oz (US) |
| 5 gal (US) | 640 fl oz (US) |
| 10 gal (US) | 1280 fl oz (US) |
| 25 gal (US) | 3200 fl oz (US) |
| 50 gal (US) | 6400 fl oz (US) |
| 100 gal (US) | 12800 fl oz (US) |
| 500 gal (US) | 64000 fl oz (US) |
| 1000 gal (US) | 128000 fl oz (US) |
Reverse conversion table
| 1 fl oz (US) | 0.0078125 gal (US) |
|---|---|
| 2 fl oz (US) | 0.015625 gal (US) |
| 5 fl oz (US) | 0.0390625 gal (US) |
| 10 fl oz (US) | 0.078125 gal (US) |
| 25 fl oz (US) | 0.195313 gal (US) |
| 50 fl oz (US) | 0.390625 gal (US) |
| 100 fl oz (US) | 0.78125 gal (US) |
| 500 fl oz (US) | 3.90625 gal (US) |
| 1000 fl oz (US) | 7.8125 gal (US) |
Key facts
| 1 US gallon | 128 US fluid ounce |
|---|---|
| 1 US fluid ounce | 0.0078125 US gallon |
Frequently asked questions
How do I convert US gallon to US fluid ounce?
Multiply the US gallon value by 128 to get US fluid ounce. For example, 10 US gallon = 1280 US fluid ounce.
How do I convert US fluid ounce back to US gallon?
Divide the US fluid ounce value by 128 (equivalently, multiply by 0.0078125) to get US gallon.
Reverse conversion
Printable A4 conversion cheat sheet — see the Downloads page