US liquid gallons to US fluid ounces
Convert us liquid gallons to us fluid ounces (US gal to US fl oz). 1 US gal = 128 US fl oz. Use the calculator, formula and conversion table.
How to convert us liquid gallons to us fluid ounces
Multiply the amount in us liquid gallons by 128 to get us fluid ounces. The displayed factor and results are rounded to 12 significant digits.
US fl oz = US gal × 128Worked example
1 US gal = 128 US fl oz. Change the amount in the calculator above to use your own value.
Units and assumptions
Units are labelled explicitly: US customary liquid cups and gallons differ from imperial units. One litre is 1,000 millilitres. This converts volume only; mass conversions need a density.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
US liquid gallons to US fluid ounces table
| US liquid gallons (US gal) | US fluid ounces (US fl oz) |
|---|---|
| 0 | 0 |
| 1 | 128 |
| 5 | 640 |
| 10 | 1,280 |
| 25 | 3,200 |
| 100 | 12,800 |
| 1,000 | 128,000 |
About this conversion
What is the formula for us liquid gallons to us fluid ounces?
US fl oz = US gal × 128. Multiply the amount in us liquid gallons by 128 to get us fluid ounces. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to us liquid gallons?
Use the us fluid ounces to us liquid gallons calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the volume converter to browse all supported pairs.