Gallon (US) to Fluid Ounce Converter
Convert gallon (us)s to fluid ounces (gal to fl oz) instantly with this free online volume converter. Enter any value in the Gallon (US) field and get the equivalent in Fluid Ounce immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 gal = 128.0000676 fl oz. To convert gallon (us)s to fluid ounces, multiply your Gallon (US) value by 128.0000676. For example, 10 gal = 1280.000676 fl oz. You can also reverse the calculation: 1 fl oz = 0.007812495872 gal.
Quick conversion table
| Gallon (US) (gal) | Fluid Ounce (fl oz) |
|---|---|
| 1 gal | 128.0000676 fl oz |
| 5 gal | 640.0003381 fl oz |
| 10 gal | 1280.000676 fl oz |
| 25 gal | 3200.001691 fl oz |
| 50 gal | 6400.003381 fl oz |
| 100 gal | 12800.00676 fl oz |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the volume category.
Formula
Gallon (US) to Fluid Ounce conversion: 1 gal = 128.0000676 fl oz fluid ounces = gallon (us)s × 128.0000676 1 fl oz = 0.007812495872 gal gallon (us)s = fluid ounces × 0.007812495872
Example
Example: Convert 10 gal to fl oz: 10 gal × 128.0000676 = 1280.000676 fl oz So, 10 gal is about 1280.000676 fl oz. To convert back, multiply by 0.007812495872: 1280.000676 fl oz × 0.007812495872 = 10 gal.
How to Use
- Enter the value you want to convert in the Gallon (US) field
- The result in Fluid Ounce appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert gallon (us)s to fluid ounces?
Enter the value in Gallon (US) (gal) in the 'From' field. The equivalent in Fluid Ounce (fl oz) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert gal to fl oz?
1 gal = 128.0000676 fl oz, so fluid ounces = gallon (us)s × 128.0000676. To convert back, 1 fl oz = 0.007812495872 gal. The full formula and a worked example are shown on this page.
How many fluid ounces are in one Gallon (US)?
1 gal = 128.0000676 fl oz.
Is this Gallon (US) to Fluid Ounce converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert fluid ounces back to gallon (us)s?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other volume unit for either field.
How accurate is the gal to fl oz conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.