VOLUME CONVERSION
US gallon to Imperial fluid ounce.
Convert us gallon (gal (US)) to imperial fluid ounce (fl oz (UK)), with the math explained.
1 gal (US) = 133.2278695 fl oz (UK)
US and UK gallons, pints, and fluid ounces are different sizes. A metric cup is 250 mL; a US customary cup is 236.5882365 mL.
THE MATH, MADE SIMPLE
How to convert us gallon to imperial fluid ounce
Multiply your us gallon value by 133.227869541 to get the equivalent in imperial fluid ounce. Both units are normalized through the liter.
fl oz (UK) = gal (US) × 133.227869510 gal (US) = 1,332.27869541 fl oz (UK)
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.US and UK gallons, pints, and fluid ounces are different sizes. A metric cup is 250 mL; a US customary cup is 236.5882365 mL.
QUICK REFERENCE
gal (US) to fl oz (UK) conversion table
| US gallon (gal (US)) | Imperial fluid ounce (fl oz (UK)) |
|---|---|
| 1 gal (US) | 133.227869541 fl oz (UK) |
| 2 gal (US) | 266.455739081 fl oz (UK) |
| 5 gal (US) | 666.139347703 fl oz (UK) |
| 10 gal (US) | 1,332.27869541 fl oz (UK) |
| 20 gal (US) | 2,664.55739081 fl oz (UK) |
| 50 gal (US) | 6,661.39347703 fl oz (UK) |
| 100 gal (US) | 13,322.7869541 fl oz (UK) |
| 500 gal (US) | 66,613.9347703 fl oz (UK) |
| 1,000 gal (US) | 133,227.869541 fl oz (UK) |
About the us gallon
The us gallon (gal (US)) is a unit of volume. One us gallon equals 3.785411784 liter (base unit) in this calculator.
All us gallon conversionsAbout the imperial fluid ounce
The imperial fluid ounce (fl oz (UK)) is a unit of volume. One imperial fluid ounce equals 0.0284130625 liter (base unit) in this calculator.
All imperial fluid ounce conversionsCommon questions
What is 1 gal (US) in fl oz (UK)?
One us gallon equals 133.227869541 fl oz (UK). Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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