Convert Fluid Ounce (US) to US gallons
Americas · Cooking Measures · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
Quick answer
1 Fluid Ounce (US) = 0.00781249 US gallons
1 Fluid Ounce (US) = 0.00781249 US gallons. Fluid Ounce (US) is a traditional volume unit from Americas.
Convert any amount
Fluid Ounce (US) to US gallons table
| Fluid Ounce (US) | US gallons |
|---|---|
| 0.25 Fluid Ounce (US) | 0.00195312 US gallons |
| 0.5 Fluid Ounce (US) | 0.00390625 US gallons |
| 1 Fluid Ounce (US) | 0.00781249 US gallons |
| 2 Fluid Ounce (US) | 0.015625 US gallons |
| 3 Fluid Ounce (US) | 0.0234375 US gallons |
| 4 Fluid Ounce (US) | 0.03125 US gallons |
| 5 Fluid Ounce (US) | 0.0390625 US gallons |
| 10 Fluid Ounce (US) | 0.0781249 US gallons |
| 20 Fluid Ounce (US) | 0.15625 US gallons |
| 25 Fluid Ounce (US) | 0.195312 US gallons |
| 50 Fluid Ounce (US) | 0.390625 US gallons |
| 100 Fluid Ounce (US) | 0.781249 US gallons |
About the Fluid Ounce (US)
US fl oz = 29.57ml.
- Symbol
- fl oz
- Value in SI
- 1 Fluid Ounce (US) = 0.0295735 litre
- Typical use
- cooking
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Frequently asked
How many US gallons are in a Fluid Ounce (US)?
1 Fluid Ounce (US) = 0.00781249 US gallons. Multiply the number of Fluid Ounce (US) by 0.0078124922 to get US gallons.
What is Fluid Ounce (US) used for?
US fl oz = 29.57ml. It is classified as active and dates from the modern period.
Is the Fluid Ounce (US) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Fluid Ounce (US) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Fluid Ounce (US) to US gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/fl-oz-us-to-us-gallon
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