Convert Gallon (US) (gal (US)) to Fluid Ounce (US) (fl oz (US)) instantly.
Gallon (US) to Fluid Ounce (US) conversion
1 Gallon (US) (gal (US)) = 128.00013 Fluid Ounce (US) (fl oz (US)). To convert Gallon (US) to Fluid Ounce (US), multiply the value by 128.00013.
| Gallon (US) (gal (US)) | Fluid Ounce (US) (fl oz (US)) |
|---|---|
| 1 | 128.00013 |
| 2 | 256.00026 |
| 5 | 640.00064 |
| 10 | 1280.0013 |
| 25 | 3200.0032 |
| 50 | 6400.0064 |
| 100 | 12800.013 |
| 1000 | 128000.13 |
Frequently asked questions
How many Fluid Ounce (US) are in one Gallon (US)?
One Gallon (US) (gal (US)) equals 128.00013 Fluid Ounce (US) (fl oz (US)).
How do I convert Gallon (US) to Fluid Ounce (US)?
To convert Gallon (US) to Fluid Ounce (US), multiply the value by 128.00013.
What is 10 Gallon (US) in Fluid Ounce (US)?
10 Gallon (US) = 1280.0013 Fluid Ounce (US).
About these units
Gallon (US) (gal (US))
The US gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It is widely used in American commerce for gasoline, milk, water, and other household liquids. Its historical roots lie in old English wine and ale gallons, whose varying definitions ultimately led to divergent US and UK systems. Today, the US gallon remains deeply embedded in American culture, especially in automotive contexts—fuel economy ratings such as "miles per gallon" (MPG) illustrate its everyday relevance. Despite the global shift toward metric volume units, the US gallon persists due to familiarity and regulatory inertia. It remains an iconic unit, symbolizing uniquely American measurement traditions.
Fluid Ounce (US) (fl oz (US))
A US fluid ounce is approximately 29.5735 milliliters. It is not a unit of weight, despite sometimes being confused with the avoirdupois ounce. In beverage serving sizes, cooking, and pharmaceuticals, the fluid ounce provides a flexible unit for small to medium volumes. It serves as the basis for bartending measurements, packaging labels, and nutritional information. Its precise value derives from the US gallon, making the fluid ounce a key link in the US customary volume system.