Converters
12
US fluid ounces to US gallons Converter
Convert us fluid ounces to us gallons instantly with the formula, worked examples, rounding guidance, and related volume conversions.
Units
85
Mode
Live
Pair-specific conversion guide
US fluid ounce to US gallon formula
Converting US fluid ounces to US gallons is straightforward: one fluid ounce equals 0.0078125 gallons. This conversion is useful for scaling liquid measurements in cooking, automotive fluids, or household tasks. To convert, multiply the number of fluid ounces by 0.0078125 to get the equivalent volume in gallons.
Formula model
1 fl oz = 0.0078125 gal
1 US fluid ounce equals
Quick factor: 1 fl oz = 0.0078125 gal.
For quick mental math, remember that 128 fluid ounces equal 1 gallon, so dividing ounces by 128 gives gallons.
Use a calculator or conversion app for precise results when dealing with large or fractional amounts.
Check the measurement system for cooking units: US customary and imperial volumes are not always the same.
Precision and rounding
The calculation uses the catalog's fixed conversion factors between fl oz and gal. Full decimal precision is kept for the calculation; only the displayed value is rounded for readability.
Reference: NIST conversion factorsVolume
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Conversion table
1 US fluid ounce equals
| Unit | Value |
|---|---|
| Liter L | 0.0295735295625 |
| Milliliter mL | 29.5735295625 |
| Cubic meter m3 | 2.95735295625E-05 |
| US teaspoon tsp | 6 |
| US tablespoon tbsp | 2 |
| US cup cup | 0.125 |
| US pint pt | 0.0625 |
| US quart qt | 0.03125 |
| US gallon gal | 0.0078125 |
FAQ
US fluid ounce to US gallon questions
How many US fluid ounces are in one US gallon?
There are 128 US fluid ounces in one US gallon, since 1 fl oz = 0.0078125 gal and 1 / 0.0078125 = 128.
Is the conversion factor the same for UK fluid ounces to UK gallons?
No, the conversion factor differs. UK fluid ounces and gallons use different volume standards, so the factor for US units (0.0078125) does not apply to UK measurements.