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⚡ Imperial Gallons to US Fluid Ounces: the quick answer
1 gal-uk = 153.722 fl oz
1 imperial gallon equals 153.722 US fluid ounces
To convert imperial gallons to US fluid ounces, multiply the value by 153.722.
To go the other way, multiply US fluid ounces by 0.00650527 to get imperial gallons.
↔ Convert US fluid ounces to imperial gallons instead
🧮 Formula
Every unit here is defined by its volume in cubic meters, so the conversion factor is (cubic meters per imperial gallon) ÷ (cubic meters per US fluid ounce).
📊 Imperial Gallons to US Fluid Ounces conversion table
✏️ Worked examples
Convert 25 imperial gallons to US fluid ounces
25 gal-uk × 153.722 = 3,843.04 fl oz
Try this example →
Convert 250 imperial gallons to US fluid ounces
250 gal-uk × 153.722 = 38,430.4 fl oz
Try this example →
📘 About these units
Imperial gallon (gal-uk). The imperial gallon is exactly 4.54609 liters, used in the UK and in some Commonwealth countries.
US fluid ounce (fl oz). A US fluid ounce is 29.5735 mL, the unit on American drink and food labels.
❓ Frequently asked questions
How many US fluid ounces are in one imperial gallon?
There are 153.722 US fluid ounces in one imperial gallon.
How do I convert imperial gallons to US fluid ounces?
Multiply the number of imperial gallons by 153.722. For example, 10 imperial gallons equal 1,537.22 US fluid ounces.
How many imperial gallons are in one US fluid ounce?
One US fluid ounce equals 0.00650527 imperial gallons.
🔗 More volume conversions
All volume units →