How many ounces in a gallon?
There are 128 fluid ounces in one gallon. US gallon. An imperial (UK) gallon is about 160 imperial fluid ounces.
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Conversion chart
| Gallon | Fluid ounces |
|---|---|
| 0.25 gallon | 32 fluid ounces |
| 0.5 gallon | 64 fluid ounces |
| 1 gallon | 128 fluid ounces |
| 2 gallon | 256 fluid ounces |
| 3 gallon | 384 fluid ounces |
| 4 gallon | 512 fluid ounces |
| 5 gallon | 640 fluid ounces |
| 10 gallon | 1,280 fluid ounces |
In practice
US gallon. An imperial (UK) gallon is about 160 imperial fluid ounces. When a recipe or plan has to be exact, convert once and write the number down instead of converting each step.
Frequently asked questions
How many ounces in a gallon?
There are 128 fluid ounces in one gallon.
How do I convert gallon to fluid ounces?
Multiply the number of gallons by 128.
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