Convert US Gallons to US Fluid Ounces
1 US gallon = 128 US fluid ounces. Type any value below to convert in either direction — the calculation happens in your browser.
US Gallons to US Fluid Ounces formula
Multiply the number of US gallons by 128 to get US fluid ounces.
US fluid ounces = US gallons × 128To go the other way: divide the number of US fluid ounces by 128, or multiply by 0.0078125.
US gallons = US fluid ounces ÷ 128US Gallons to US Fluid Ounces conversion table
| US Gallons | US Fluid Ounces |
|---|---|
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 3 gal | 384 fl oz |
| 4 gal | 512 fl oz |
| 5 gal | 640 fl oz |
| 6 gal | 768 fl oz |
| 7 gal | 896 fl oz |
| 8 gal | 1,024 fl oz |
| 9 gal | 1,152 fl oz |
| 10 gal | 1,280 fl oz |
| 15 gal | 1,920 fl oz |
| 20 gal | 2,560 fl oz |
| 25 gal | 3,200 fl oz |
| 30 gal | 3,840 fl oz |
| 40 gal | 5,120 fl oz |
| 50 gal | 6,400 fl oz |
| 75 gal | 9,600 fl oz |
| 100 gal | 12,800 fl oz |
| 250 gal | 32,000 fl oz |
| 500 gal | 64,000 fl oz |
| 1,000 gal | 128,000 fl oz |
US Fluid Ounces to US Gallons conversion table
| US Fluid Ounces | US Gallons |
|---|---|
| 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 |
About the US gallon
A US liquid gallon is exactly 3.785411784 litres, or 128 fluid ounces.
About the US fluid ounce
A US fluid ounce is about 29.57 millilitres; the imperial fluid ounce is slightly smaller at 28.41 millilitres.
Frequently asked questions
How many US fluid ounces are in a US gallon?
There are 128 US fluid ounces in one US gallon.
How many US gallons are in a US fluid ounce?
There are 0.0078125 US gallons in one US fluid ounce.
Is this conversion exact?
The ratio between the US gallon and the US fluid ounce is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 US gallons in US fluid ounces?
10 US gallons equals 1,280 US fluid ounces.
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