Gallons to Imperial Fluid Ounces
Convert Gallons to Imperial Fluid Ounces instantly. Free online volume unit converter with exact formula, conversion table and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Converter
Length Converter
Convert metric, imperial, and nautical distance units.
Context values
Some unit families need one extra value for a physically accurate result.
Use the converter to see the formula.
Results update instantly for Gallons to Imperial Fluid Ounces conversions.
Reserved above the conversion cards and below the converter.
Formula
fl oz (UK) = gal × 133.227869541
gal = fl oz (UK) ÷ 133.227869541
Conversion table
| 1 gal | 133.228 fl oz (UK) |
| 5 gal | 666.139 fl oz (UK) |
| 10 gal | 1332.28 fl oz (UK) |
| 20 gal | 2664.56 fl oz (UK) |
| 50 gal | 6661.39 fl oz (UK) |
| 100 gal | 13322.8 fl oz (UK) |
| 500 gal | 66613.9 fl oz (UK) |
| 1000 gal | 133228 fl oz (UK) |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many Imperial Fluid Ounces are in one Gallon?
One Gallon equals 133.227869541 fl oz (UK).
How do I convert Gallons to Imperial Fluid Ounces?
Multiply the value in Gallons by 133.227869541 to get Imperial Fluid Ounces. Formula: fl oz (UK) = gal × 133.227869541.
Is this Gallons to Imperial Fluid Ounces conversion exact?
Yes. It is based on internationally recognized unit definitions, so the factor 133.227869541 is exact to the precision shown.
When is Gallons to Imperial Fluid Ounces commonly used?
It is commonly used for fuel, beverages, cooking, water storage, agriculture, laboratories, and everyday industrial liquid measurements.
Reserved between the FAQ and the article so the page stays balanced.
About this conversion
The Gallon and the Imperial Fluid Ounce are both units of volume. The US gallon is a customary unit of liquid volume used mainly in the United States for measuring fuel, water, and beverages. The imperial fluid ounce is the British counterpart of the fluid ounce, used for bottled drinks and recipes in the UK. To convert, multiply the Gallons value by 133.227869541 (formula: fl oz (UK) = gal × 133.227869541). It is commonly used for fuel, beverages, cooking, water storage, agriculture, laboratories, and everyday industrial liquid measurements. This conversion factor is derived directly from the internationally accepted metric and customary unit definitions, so results are precise and repeatable.