📏 US fluid ounces to US gallons Converter
Convert us fluid ounces (fl oz) to us gallons (gal) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 us fluid ounce (fl oz) = 0.0078125 us gallons (gal). Formula: gal = fl oz × 0.0078125.
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US fluid ounces to US gallons Converter inputs
Result
US fluid ounces to US gallons conversion table
| US fluid ounces (fl oz) | US gallons (gal) |
|---|---|
| 0.1 fl oz | 0.00078125 gal |
| 0.5 fl oz | 0.00390625 gal |
| 1 fl oz | 0.0078125 gal |
| 2 fl oz | 0.015625 gal |
| 3 fl oz | 0.0234375 gal |
| 5 fl oz | 0.0390625 gal |
| 10 fl oz | 0.078125 gal |
| 20 fl oz | 0.15625 gal |
| 25 fl oz | 0.1953125 gal |
| 50 fl oz | 0.390625 gal |
| 100 fl oz | 0.78125 gal |
| 1,000 fl oz | 7.8125 gal |
Other volume conversions
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How to convert us fluid ounces to us gallons
Multiply the number of us fluid ounces by 0.0078125 to get us gallons: gal = fl oz × 0.0078125.
Example: 5 fl oz = 0.0390625 gal.
The us fluid ounce (fl oz) and the us gallon (gal) are both units of volume. Need the opposite direction? Use the gal to fl oz converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many us gallons are in a us fluid ounce?
1 us fluid ounce = 0.0078125 us gallons.
How do I convert us fluid ounces to us gallons?
Use the formula gal = fl oz × 0.0078125. For example, 5 fl oz = 0.0390625 gal.
How do I convert us gallons back to us fluid ounces?
1 us gallon = 128 us fluid ounces. Use the gal to fl oz converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.