Volume
fl oz (US)togal (US)
Convert US fluid ounces (fl oz (US)) to US gallons (gal (US)).
Factor1 fl oz (US) = 0.0078125 gal (US)
Converter
fl oz (US)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gal (US)
Rendered to 6 significant figures.
Formula
Formula
gal (US) = fl oz (US) × 0.0078125
Multiply any value in US fluid ounces by 0.0078125 to obtain the value in US gallons.
Worked example
Convert 128 fl oz (US) to gal (US).
- 01Start with 128 fl oz (US).
- 02Multiply by the conversion factor: 128 × 0.0078125 = 1 gal (US).
Result128 fl oz (US) = 1 gal (US)
Conversion table
| fl oz (US) | gal (US) |
|---|---|
| 1 | 0.0078125 |
| 2 | 0.015625 |
| 5 | 0.039063 |
| 10 | 0.078125 |
| 20 | 0.15625 |
| 50 | 0.39063 |
| 100 | 0.78125 |
| 200 | 1.5625 |
| 500 | 3.9063 |
| 1000 | 7.8125 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from fl oz (US) to gal (US)?
1 fl oz (US) equals 0.0078125 gal (US). To convert, multiply the value in US fluid ounces by 0.0078125.
How do I convert 1 fl oz (US) to gal (US)?
1 fl oz (US) = 0.0078125 gal (US). For any value, multiply by 0.0078125.
How do I convert gal (US) back to fl oz (US)?
Divide by the same factor — or equivalently, multiply by 128. So 1 gal (US) = 128 fl oz (US).
When would I need to convert US fluid ounce to US gallon?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).