Convert US gallons to US fluid ounces
Convert US gallons (gal) to US fluid ounces (fl oz). 1 gal = 128 fl oz, and 1 fl oz = 0.0078125 gal.
Gallons to Fluid Ounces formula
fl oz = gal × 128
Multiply the number of US gallons by 128.
Example: To convert 1 gal to US fluid ounces: 1 × 128 = 128 fl oz.
Quick answers
- What is 1 gal in US fluid ounces?
- 1 gal = 128 fl oz
- What is 5 gal in US fluid ounces?
- 5 gal = 640 fl oz
- What is 10 gal in US fluid ounces?
- 10 gal = 1,280 fl oz
Gallons to Fluid Ounces conversion table
Fluid Ounces to Gallons table| US gallons (gal) | US fluid ounces (fl oz) |
|---|---|
| 0.5 gal | 64 fl oz |
| 1 gal | 128 fl oz |
| 2 gal | 256 fl oz |
| 3 gal | 384 fl oz |
| 5 gal | 640 fl oz |
| 10 gal | 1,280 fl oz |
| 12 gal | 1,536 fl oz |
| 15 gal | 1,920 fl oz |
| 20 gal | 2,560 fl oz |
| 25 gal | 3,200 fl oz |
| 50 gal | 6,400 fl oz |
| 55 gal | 7,040 fl oz |
| 100 gal | 12,800 fl oz |
| 500 gal | 64,000 fl oz |
| 1,000 gal | 128,000 fl oz |
Frequently asked questions
How many US fluid ounces are in a US gallon?
There are 128 US fluid ounces in a US gallon (1 gal = 128 fl oz).
How do I convert US gallons to US fluid ounces?
Multiply the number of US gallons by 128. To convert 1 gal to US fluid ounces: 1 × 128 = 128 fl oz.
Is the Gallons to Fluid Ounces conversion exact?
Yes. Both units are defined exactly, so 1 US gallon is exactly 128 US fluid ounces. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.
What is 1 gal in US fluid ounces?
1 gal = 128 fl oz.
How do I convert US fluid ounces back to US gallons?
Use the reverse relationship: 1 fl oz = 0.0078125 gal. The Fluid Ounces to Gallons page has a converter and a full table.
More volume conversions
- Gallons to ML
- Gallons to Liters
- Gallons to Cups
- Gallons to Pints
- Gallons to Quarts
- Gallons to UK Gallons
- Gallons to Cubic Meters
- Gallons to Barrels
- ML to Fluid Ounces
- Liters to Fluid Ounces
- Cups to Fluid Ounces
- Pints to Fluid Ounces