Convert US Fluid Ounce to Imperial Gallon
Convert us fluid ounces to imperial gallons instantly. 1 us fluid ounce = 0.0065052671 imperial gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Gallon to US Fluid Ounce converter for the reverse conversion.
Units explained
US Fluid Ounce
A US fluid ounce is 1/128 of a US gallon (29.5735 mL).
Derived from the gallon subdivision; distinct from the slightly smaller UK fluid ounce.
Standard for US beverage and nutrition labeling.
English customary; US since 1824.
Imperial Gallon
The imperial gallon is defined as exactly 4.54609 liters.
Set by the British Weights and Measures Act of 1824 as the volume of 10 lb of water.
Used for fuel and beverages in the UK and Commonwealth.
UK, 1824.
US Fluid Ounce to Imperial Gallon conversion formula
The relationship between us fluid ounces and imperial gallons:
To convert us fluid ounces to imperial gallons, multiply the value in us fluid ounces by 0.0065052671. To reverse, multiply imperial gallons by 153.7215904646.
How to use this converter
Type a value into the calculator. The result in imperial gallons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Imperial Gallon to US Fluid Ounce converter for the reverse direction.
Step-by-step: convert us fluid ounces to imperial gallons
- Write down the value in us fluid ounces (fl oz).
- Multiply that value by the factor 0.0065052671.
- The product is the equivalent value in imperial gallons (gal).
- To reverse, multiply the imperial gallon value by 153.7215904646.
Worked examples
Example 1 — Convert 1 fl oz to gal:
1 × 0.0065052671 = 0.0065052671 gal
Example 2 — Convert 100 fl oz to gal:
100 × 0.0065052671 = 0.6505267067 gal
Real-world example — Packaging gauge
A 4-us fluid ounce plastic bag thickness is a common spec for grocery and freezer bags. Converting from us fluid ounces to imperial gallons is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 fl oz × 0.0065052671 = 0.0260210683 gal
Real-world example — Plastic film and laminate thickness
A 500-us fluid ounce sheet is a typical spec for ID-card laminates and film overlays. Converting to imperial gallons aligns the value with the unit most CAD systems and material datasheets prefer.
500 fl oz × 0.0065052671 = 3.2526335337 gal
US Fluid Ounce to Imperial Gallon conversion table
Standard reference values for converting us fluid ounces to imperial gallons:
| US Fluid Ounce [fl oz] | Imperial Gallon [gal] |
|---|---|
| 0.01 | 6.505267e-5 |
| 0.1 | 0.0006505267 |
| 1 | 0.0065052671 |
| 2 | 0.0130105341 |
| 3 | 0.0195158012 |
| 4 | 0.0260210683 |
| 5 | 0.0325263353 |
| 10 | 0.0650526707 |
| 20 | 0.1301053413 |
| 30 | 0.195158012 |
| 40 | 0.2602106827 |
| 50 | 0.3252633534 |
| 100 | 0.6505267067 |
| 500 | 3.2526335337 |
| 1000 | 6.5052670674 |
Frequently asked questions
How many imperial gallons is 1 us fluid ounce?
How do I convert us fluid ounces to imperial gallons?
How do I convert imperial gallons back to us fluid ounces?
How many imperial gallons is 100 us fluid ounces?
Popular volume unit conversions
Convert US Fluid Ounce to other volume units
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Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 fl oz = 0.0065052671 gal) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.