QConvert
Gallon (US) to Fluid Ounce (US) Converter
Convert Gallon (US) to Fluid Ounce (US) instantly — live results with exact conversion factors.
Answer
1 gallon (us) = 128 fluid ounces (us). To convert gal to fl oz, multiply by 128.
Quick Reference Table
| Gallon (US) (gal) | Fluid Ounce (US) (fl oz) |
|---|---|
| 1 | 128 |
| 2 | 256 |
| 5 | 640 |
| 10 | 1280 |
| 20 | 2560 |
| 50 | 6400 |
| 100 | 12800 |
| 250 | 32000 |
| 500 | 64000 |
| 1000 | 128000 |
Formula
Convert Gallon (US) (gal) to Fluid Ounce (US) (fl oz) using the relationship:
fl oz = gal × 128
How to Convert
- Take the value in gallons (us) (gal).
- Multiply it by 128 (the conversion factor from gal to fl oz).
- The result is the equivalent value in fluid ounces (us) (fl oz).
- Example: 1 gal = 128 fl oz.
Reverse Conversion
Need it the other direction? Fluid Ounce (US) to Gallon (US) conversion.
All Volume Conversions
See the full list of Volume conversions.
Related Conversions
FAQ
▸ How many fluid ounces (us) are in 1 gallon (us)?
1 Gallon (US) equals 128 fluid ounces (us). Multiply by 128 to convert gal to fl oz.
▸ What is the formula to convert gallon (us) to fluid ounce (us)?
Multiply the value in gallons (us) by 128 to get fluid ounces (us). Formula: fl oz = gal × 128.
▸ How do I convert gallons (us) to fluid ounces (us) easily?
Enter your value in the converter at the top of this page — the fluid ounces (us) result updates live as you type. You can also multiply by 128 directly.