Convert US fluid ounces to US gallons
1 fl oz = 0.0078125 gal. Change the amount below, or read the formula and the reference table further down.
1 US fluid ounce equals
US gallons
1 fl oz = 0.0078125 gal
The formula
US fluid ounces and US gallons both measure volume from the same zero, so a single multiplier does the job.
gal = fl oz × 0.0078125
Going the other way? Convert US gallons to US fluid ounces.
US fluid ounces to US gallons table
Common values, rounded for reading.
| US fluid ounces (fl oz) | US gallons (gal) |
|---|---|
| 1 | 0.007813 |
| 2 | 0.015625 |
| 3 | 0.023437 |
| 4 | 0.03125 |
| 5 | 0.039063 |
| 6 | 0.046875 |
| 7 | 0.054688 |
| 8 | 0.0625 |
| 9 | 0.070313 |
| 10 | 0.078125 |
| 15 | 0.117188 |
| 20 | 0.15625 |
| 25 | 0.195313 |
| 30 | 0.234375 |
| 40 | 0.3125 |
| 50 | 0.390625 |
| 75 | 0.585938 |
| 100 | 0.78125 |
| 250 | 1.9531 |
| 500 | 3.9063 |
| 1,000 | 7.8125 |
Questions people ask
- How many US gallons are in a US fluid ounce?
- One US fluid ounce equals 0.0078125 US gallons.
- How do I convert US fluid ounces to US gallons by hand?
- Multiply the number of US fluid ounces by 0.0078125. For a rough check, 0.008 is close enough for most everyday use.
- What is 1 US fluid ounce in US gallons?
- 1 US fluid ounce is 0.0078125 US gallons.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.