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US liquid gallons to Imperial fluid ounces

1 US gal ≈ 133.2 UK fl oz. Edit either value to convert instantly.

1 US gal≈UK fl oz
= 16 cup + 0 tbsp + 0 tsp · ≈ 3.78541 L

Conversion formula

UK fl oz = US gal × (3.785411784) × (16,000,000 / 454,609)

1 US gal ≈ 133.228 UK fl oz

US liquid gallon (US gal)

A US liquid gallon is exactly 3.785411784 L, or 231 cubic inches; the imperial gallon is a different unit.

Source: NIST SP 811, Appendix B.9 — conversion factors

imperial fluid ounce (UK fl oz)

One imperial fluid ounce equals exactly 0.0284130625 L.

Source: UK Weights and Measures Act 1985, Schedule 1

Conversion table

US galUK fl oz
≈ 133.228
≈ 266.456
≈ 666.139
≈ 1,332.28
≈ 1,998.42
≈ 2,664.56
≈ 3,330.7
≈ 3,996.84
≈ 5,329.11
≈ 5,995.25
US galUK fl oz
≈ 6,661.39
≈ 7,993.67
≈ 9,325.95
≈ 10,658.2
≈ 11,990.5
≈ 13,322.8
≈ 19,984.2
≈ 21,316.5
≈ 22,648.7
≈ 23,981

Frequently asked questions

How many imperial fluid ounces are in 1 US liquid gallon?

1 US gal ≈ 133.2 UK fl oz. UK fl oz = US gal × (3.785411784) × (16,000,000 / 454,609)

How do I convert US gal to UK fl oz?

UK fl oz = US gal × (3.785411784) × (16,000,000 / 454,609)

Is 1 US liquid gallon bigger than 1 imperial fluid ounce?

1 US gal ≈ 133.2 UK fl oz.

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