US fluid ounces to US gallons converter
US gallons (US gal)
1 US fluid ounce = 0.0078125 US gallons
How to convert US fluid ounces to US gallons
US gal = US fl oz × 0.0078125
Multiply the number of US fluid ounces by 0.0078125 to get US gallons. Going the other way, divide by 0.0078125 (or multiply by 128).
One US fluid ounce is exactly defined as 0.0078125 US gallons (to 12 significant figures), and one US gallon is 128 US fluid ounces.
Worked examples
- Convert 5 US fluid ounces: 5 × 0.0078125 = 0.0390625 0.0390625 US gallons.
- Convert 12.5 US fluid ounces: 12.5 × 0.0078125 = 0.09765625 0.09765625 US gallons.
- Convert 250 US fluid ounces: 250 × 0.0078125 = 1.953125 1.953125 US gallons.
Quick-reference table
| US fl oz | US gal |
|---|---|
| 1 | 0.0078125 |
| 2 | 0.015625 |
| 3 | 0.0234375 |
| 5 | 0.0390625 |
| 10 | 0.078125 |
| 15 | 0.1171875 |
| 20 | 0.15625 |
| 25 | 0.1953125 |
| 50 | 0.390625 |
| 75 | 0.5859375 |
| 100 | 0.78125 |
| 1,000 | 7.8125 |
| US gal | US fl oz |
|---|---|
| 1 | 128 |
| 2 | 256 |
| 3 | 384 |
| 5 | 640 |
| 10 | 1,280 |
| 15 | 1,920 |
| 20 | 2,560 |
| 25 | 3,200 |
| 50 | 6,400 |
| 75 | 9,600 |
| 100 | 12,800 |
| 1,000 | 128,000 |
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Frequently asked questions
How many US gallons are in 1 US fluid ounce?
1 US fluid ounce equals 0.0078125 US gallons.
What is the formula to convert US fluid ounces to US gallons?
Use US gal = US fl oz × 0.0078125. Multiply the number of US fluid ounces by 0.0078125 to get US gallons. Going the other way, divide by 0.0078125 (or multiply by 128).
What is 100 US fluid ounces in US gallons?
100 US fluid ounces is 0.78125 US gallons.