Convert US Gallon to US Fluid Ounce
Use this free converter to change us gallons (gal) into us fluid ounces (fl oz). Us gallon and us fluid ounce both measure volume. As a quick reference, 1 gal equals 128 fl oz, and 1 fl oz equals 0.0078125 gal.
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US Fluid Ounce (fl oz)
128
1 gal = 128 fl oz
Volume conversion table
| US Gallon | US Fluid Ounce |
|---|---|
| 0.01 | 1.28 |
| 0.1 | 12.8 |
| 0.5 | 64 |
| 1 | 128 |
| 2 | 256 |
| 3 | 384 |
| 5 | 640 |
| 10 | 1280 |
| 20 | 2560 |
| 25 | 3200 |
| 50 | 6400 |
| 100 | 12800 |
| 1,000 | 128000 |
How to convert US Gallon to US Fluid Ounce
Multiply the us gallon value by 128 to get us fluid ounces.
- Enter the number of us gallons you want to convert.
- The converter instantly shows the equivalent value in us fluid ounces.
- Worked example: 15 gal × 128 = 1920 fl oz.
- Use the swap button to reverse the conversion (us fluid ounce to us gallon).
About these units
US Gallon (gal)
- Definition
- A US gallon (gal) is a unit of volume equal to 3.785411784 liters, or 128 US fluid ounces.
- History
- It is based on the old English wine gallon of 231 cubic inches, adopted by the United States.
- Current use
- US gallons measure fuel, milk, and paint in the United States.
US Fluid Ounce (fl oz)
- Definition
- A US fluid ounce (fl oz) is a volume unit of about 29.57 milliliters, one sixteenth of a US pint.
- History
- It originated as the volume of one ounce of wine or water and was later fixed by definition.
- Current use
- Fluid ounces label drinks and cosmetics and appear in US recipes.
Frequently asked questions
How many us fluid ounces are in a us gallon?
There are 128 fl oz in 1 gal. To convert, multiply the number of us gallons by 128.
How do I convert us gallons to us fluid ounces?
Multiply the us gallon value by 128 to get us fluid ounces. For example, 10 gal = 1280 fl oz.
Is this us gallon-to-us fluid ounce converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert US Gallon to other volume units
| Unit | 1 US Gallon equals |
|---|---|
| Liter (L) | 3.7854118 L |
| Milliliter (mL) | 3785.4118 mL |
| Cubic Meter (m³) | 0.0037854118 m³ |
| Cubic Centimeter (cm³) | 3785.4118 cm³ |
| Imperial Gallon (imp gal) | 0.83267418 imp gal |
| US Quart (qt) | 4 qt |
| US Pint (pt) | 8 pt |
| US Cup (cup) | 16 cup |
| US Fluid Ounce (fl oz) | 128 fl oz |
| Tablespoon (tbsp) | 256 tbsp |
| Teaspoon (tsp) | 768 tsp |