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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Example: US gallon to imperial fluid ounce

Starting value Increment Accuracy

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

'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.

Score: 0

5 US gallon equals 666 imperial fluid ounce.

Correct answer: 5 US gallon = 666 imperial fluid ounce.

9.6 imperial fluid ounce equals 0.108 US gallon.

Correct answer: 9.6 imperial fluid ounce = 0.0721 US gallon.

3 imperial fluid ounce equals 0.0225 US gallon.

Correct answer: 3 imperial fluid ounce = 0.0225 US gallon.

10.5 US gallon equals 1.4e+3 imperial fluid ounce.

Correct answer: 10.5 US gallon = 1.4e+3 imperial fluid ounce.

128 US gallon equals 2.56e+4 imperial fluid ounce.

Correct answer: 128 US gallon = 1.71e+4 imperial fluid ounce.