US gallons to US fluid ounces Converter
Convert us gallons (gal) to us fluid ounces (fl oz) instantly. Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres.
Result
- US fluid ounces
- 128.0001 fl oz
How to use the us gallons to us fluid ounces converter
- Enter the us gallons (gal).
- The results update as you type, or press Calculate.
- Read the us fluid ounces first, then the supporting figures below it.
Formula
US fluid ounces = us gallons × 128.0000676281
Worked example
For example, with these inputs:
- US gallons (gal): 1
the calculator returns:
- US fluid ounces: 128.0001 fl oz
US gallons to US fluid ounces table
| US gallons | US fluid ounces |
|---|---|
| 1 gal | 128.0001 fl oz |
| 2 gal | 256.0001 fl oz |
| 5 gal | 640.0003 fl oz |
| 10 gal | 1,280 fl oz |
| 20 gal | 2,560 fl oz |
| 25 gal | 3,200 fl oz |
| 50 gal | 6,400 fl oz |
| 100 gal | 12,800.01 fl oz |
| 250 gal | 32,000.02 fl oz |
| 500 gal | 64,000.03 fl oz |
| 1,000 gal | 128,000.07 fl oz |
About this conversion
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many us fluid ounces are in one us gallon?
1 gal = 128.0001 fl oz.
How do I convert gal to fl oz?
US fluid ounces = us gallons × 128.0000676281.