Convert Fluid Ounces to Gallons (US)
Instantly convert Fluid Ounces (fl oz) to Gallons (US) (gal) with our free online calculator.
Formula: fl oz to gal — multiply by 0.0078125
Reference Table
| Fluid Ounces (fl oz) | Gallons (US) (gal) |
|---|---|
| 1 | 0.0078125 |
| 5 | 0.0390625 |
| 10 | 0.078125 |
| 25 | 0.195312 |
| 50 | 0.390625 |
| 100 | 0.78125 |
How to Convert Fluid Ounces to Gallons (US)
Formula
To convert Fluid Ounces (fl oz) to Gallons (US) (gal): multiply by 0.0078125
Step-by-Step
- Start with your value in Fluid Ounces (fl oz).
- Multiply by 0.0078125 to perform the conversion.
- The result is your value expressed in Gallons (US) (gal).
Conversion Factor
1 fl oz = 0.0078125 gal
Reverse Factor
1 gal = 128 fl oz
Worked Example
Convert 25 Fluid Ounces to Gallons (US): 25 fl oz = 0.195312 gal
About Fluid Ounce (fl oz)
A US customary unit of liquid volume equal to 1/128 of a US gallon (about 29.57 mL). Fluid ounces are the standard unit on US beverage containers, shampoo bottles, cooking recipes, and cocktail recipes — a standard US soda can is 12 fl oz, a large Starbucks drink is 20 fl oz, and most cocktails call for 1.5 fl oz of spirits. Easy to confuse with the Imperial fluid ounce (~28.41 mL) used in the UK, though the difference is small enough that it rarely matters for everyday use.
About Gallon (US) (gal)
A US customary unit of volume equal to exactly 3.785411784 liters, or 128 fluid ounces. US gallons are the default unit for US gasoline pricing and fuel economy (miles per gallon), milk and beverage containers, water heaters, and pool/aquarium capacity. Different from the Imperial gallon used in the UK (4.546 L) — a frequent source of confusion when comparing US vs. UK fuel economy or trans-Atlantic recipes. One US gallon weighs about 8.34 pounds.
Quick Facts
- 1 Fluid Ounce equals 0.0078125 Gallons (US)
- 1 Gallon (US) equals 128 Fluid Ounces
- Fluid Ounce is a unit of volume
- Gallon (US) is a unit of volume
- This conversion is commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement
- The Fluid Ounce belongs to the imperial system
Common Fluid Ounce to Gallon (US) Conversions
| Fluid Ounces (fl oz) | Gallons (US) (gal) |
|---|---|
| 0.01 | 0.000078125 |
| 0.1 | 0.00078125 |
| 0.25 | 0.00195312 |
| 0.5 | 0.00390625 |
| 1 | 0.0078125 |
| 2 | 0.015625 |
| 3 | 0.0234375 |
| 5 | 0.0390625 |
| 10 | 0.078125 |
| 15 | 0.117187 |
| 20 | 0.15625 |
| 25 | 0.195312 |
| 50 | 0.390625 |
| 75 | 0.585937 |
| 100 | 0.78125 |
| 250 | 1.95312 |
| 500 | 3.90625 |
| 1000 | 7.8125 |
| 5000 | 39.0625 |
| 10000 | 78.125 |
Understanding Fluid Ounces
The Fluid Ounce (symbol: fl oz) is a unit of volume. A US customary unit of liquid volume equal to 1/128 of a US gallon (about 29.57 mL). Fluid ounces are the standard unit on US beverage containers, shampoo bottles, cooking recipes, and cocktail recipes — a standard US soda can is 12 fl oz, a large Starbucks drink is 20 fl oz, and most cocktails call for 1.5 fl oz of spirits. Easy to confuse with the Imperial fluid ounce (~28.41 mL) used in the UK, though the difference is small enough that it rarely matters for everyday use.
It belongs to the imperial measurement system.
Fluid Ounces are commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement.
Understanding Gallons (US)
The Gallon (US) (symbol: gal) is a unit of volume. A US customary unit of volume equal to exactly 3.785411784 liters, or 128 fluid ounces. US gallons are the default unit for US gasoline pricing and fuel economy (miles per gallon), milk and beverage containers, water heaters, and pool/aquarium capacity. Different from the Imperial gallon used in the UK (4.546 L) — a frequent source of confusion when comparing US vs. UK fuel economy or trans-Atlantic recipes. One US gallon weighs about 8.34 pounds.
It belongs to the imperial measurement system.
Gallons (US) are commonly used in cooking, chemistry, fluid mechanics, and everyday liquid measurement.
Why Convert Fluid Ounces to Gallons (US)?
Volume conversions between Fluid Ounces and Gallons (US) are essential in cooking, chemistry, and fluid mechanics. Recipes from different countries use different measurement systems, laboratory procedures reference varying units, and engineers designing fluid systems need precise volume calculations for pipes, tanks, and pumps.
Frequently Asked Questions
How do I convert Fluid Ounces to Gallons (US)?
A US customary unit of liquid volume equal to 1/128 of a US gallon (about 29. To convert Fluid Ounces to Gallons (US), multiply by 0.0078125. For example, 25 fl oz equals 0.195312 gal.
How many Gallons (US) are in 1 Fluid Ounce?
There are 0.0078125 Gallons (US) in 1 Fluid Ounce.
How many Fluid Ounces are in 1 Gallon (US)?
There are 128 Fluid Ounces in 1 Gallon (US).
What is the formula for Fluid Ounce to Gallon (US) conversion?
The formula is: multiply by 0.0078125. This means 1 fl oz = 0.0078125 gal.
Is a Fluid Ounce bigger than a Gallon (US)?
Yes. One Fluid Ounce is larger than one Gallon (US) because 1 fl oz equals 0.0078125 gal, which is less than 1.
When do you need to convert between Fluid Ounces and Gallons (US)?
A US customary unit of volume equal to exactly 3. Fluid Ounce and Gallon (US) are both volume units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.