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Convert US gallon to imperial fluid ounce

Here you can quickly calculate how many imperial fluid ounce fit in one US gallon.
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  • 1 gal = 133.22787 fl oz (uk)
  • 1 fl oz (uk) = 0.007506 gal

Example: US gallon to imperial fluid ounce

  • 1 US gallon = 133.22787 Imperial fluid ounce

US gallon to imperial fluid ounce conversion table

US gallon Imperial fluid ounce
1 133.22787
2 266.455739
5 666.139348
10 1332.278695
20 2664.557391
50 6661.393477
100 13322.786954

US gallon to imperial fluid ounce formula

To convert US gallon to imperial fluid ounce, multiply by 133.22787.

1 gal = 133.22787 fl oz (uk)
Example: 1 US gallon = 133.22787 Imperial fluid ounce

Common volume conversion mistakes

  • 'Gallon' names two different measures: the US gallon is about 3.785 liters and the imperial gallon about 4.546 liters, a full 20% larger. US fuel figures and UK recipes therefore use different gallons. Always check the country before converting.
  • A fluid ounce measures volume, not weight. The US fl oz is about 29.57 ml and the imperial fl oz about 28.41 ml, and neither matches the weight ounce (28.35 g) except roughly for water. Measure liquids in milliliters to avoid the ambiguity.

Quick US gallon and imperial fluid ounce conversion quiz

Score: 0

5.4 US gallon equals 719 imperial fluid ounce.

Correct answer: 5.4 US gallon = 719 imperial fluid ounce.

21.8 US gallon equals 4 360 imperial fluid ounce.

Correct answer: 21.8 US gallon = 2 900 imperial fluid ounce.

131 US gallon equals 17 500 imperial fluid ounce.

Correct answer: 131 US gallon = 17 500 imperial fluid ounce.

More volume conversions