Fluid ounces (fl oz) to US gallons (gal) Conversion
Fluid ounces
The fluid ounce is a unit of volume used for measuring liquids in the US customary and imperial systems. The US fluid ounce is approximately 29.5735 mL while the imperial fluid ounce is 28.4131 mL. It should not be confused with the avoirdupois ounce (a unit of mass). In the United States, oral liquid medications and beverage serving sizes on nutrition labels are expressed in fluid ounces.
US gallons
The US liquid gallon is a unit of volume equal to exactly 3.785411784 litres, used primarily in the United States for fuel sales, beverage containers, and agricultural applications. It is divided into 4 quarts, 8 pints, or 128 fluid ounces. The US gallon is approximately 16.7% smaller than the imperial (UK) gallon — a difference with significant implications in fuel economy comparisons and recipe conversions.
| Fluid ounces (fl oz) | US gallons (gal) |
|---|---|
| 0.1 fl oz | 0.00078125000099065 gal |
| 1 fl oz | 0.0078125000099065 gal |
| 2 fl oz | 0.015625000019813 gal |
| 3 fl oz | 0.023437500029719 gal |
| 5 fl oz | 0.039062500049532 gal |
| 10 fl oz | 0.078125000099065 gal |
| 20 fl oz | 0.15625000019813 gal |
| 30 fl oz | 0.23437500029719 gal |
| 50 fl oz | 0.39062500049532 gal |
| 100 fl oz | 0.78125000099065 gal |
| 1000 fl oz | 7.8125000099065 gal |
Frequently Asked Questions (FAQ)
How many US gallons are in 1 fluid ounces?
1 fluid ounces (fl oz) is exactly 0.007813 US gallons (gal).
How do I convert fluid ounces to US gallons?
Multiply the value in fluid ounces by 0.007813 to get the result in US gallons. Or use the converter above — type any number and see the result instantly.