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Convert US Liquid Gallons to Imperial Gallons

Convert gallons to imperial gallons instantly (US Liquid Gallons to Imperial Gallons). 1 gal (US) = 0.8326741846 gal (Imp).

Converter

US liquid gallon (gal (US))
Imperial gallon (gal (Imp))

gal (US) to gal (Imp) conversion table

US liquid gallonsImperial gallons
1 gal (US)0.83267418 gal (Imp)
2 gal (US)1.6653484 gal (Imp)
5 gal (US)4.1633709 gal (Imp)
10 gal (US)8.3267418 gal (Imp)
25 gal (US)20.816855 gal (Imp)
50 gal (US)41.633709 gal (Imp)
100 gal (US)83.267418 gal (Imp)
1000 gal (US)832.67418 gal (Imp)

Formula

gal (Imp) = gal (US) × 0.8326741846

Worked example

25 gal (US) × 0.8326741846 = 20.81685462 gal (Imp)

Popular gal (US) to gal (Imp) conversions

Quick answers for common values, each with its own formula and worked steps.

  • 1 gallons to imperial gallons

    1 gal (US) = 0.832674 gal (Imp). Formula, working and reverse conversion.

    convertly.website/1-gallons-to-imperial-gallons/
  • 2 gallons to imperial gallons

    2 gal (US) = 1.66535 gal (Imp). Formula, working and reverse conversion.

    convertly.website/2-gallons-to-imperial-gallons/
  • 5 gallons to imperial gallons

    5 gal (US) = 4.16337 gal (Imp). Formula, working and reverse conversion.

    convertly.website/5-gallons-to-imperial-gallons/
  • 10 gallons to imperial gallons

    10 gal (US) = 8.32674 gal (Imp). Formula, working and reverse conversion.

    convertly.website/10-gallons-to-imperial-gallons/
  • 20 gallons to imperial gallons

    20 gal (US) = 16.6535 gal (Imp). Formula, working and reverse conversion.

    convertly.website/20-gallons-to-imperial-gallons/
  • 25 gallons to imperial gallons

    25 gal (US) = 20.8169 gal (Imp). Formula, working and reverse conversion.

    convertly.website/25-gallons-to-imperial-gallons/
  • 50 gallons to imperial gallons

    50 gal (US) = 41.6337 gal (Imp). Formula, working and reverse conversion.

    convertly.website/50-gallons-to-imperial-gallons/
  • 100 gallons to imperial gallons

    100 gal (US) = 83.2674 gal (Imp). Formula, working and reverse conversion.

    convertly.website/100-gallons-to-imperial-gallons/
  • 500 gallons to imperial gallons

    500 gal (US) = 416.337 gal (Imp). Formula, working and reverse conversion.

    convertly.website/500-gallons-to-imperial-gallons/
  • 1000 gallons to imperial gallons

    1000 gal (US) = 832.674 gal (Imp). Formula, working and reverse conversion.

    convertly.website/1000-gallons-to-imperial-gallons/

About US liquid gallons and Imperial gallons

US liquid gallon (gal (US))

The US liquid gallon is defined as 231 cubic inches, which is exactly 3.785411784 liters. It is used for fuel and liquids in the United States.

Imperial gallon (gal (Imp))

The Imperial gallon is exactly 4.54609 liters, about 20 % larger than the US gallon. It is used in the UK, and for fuel economy figures in miles per Imperial gallon.

Both are units of volume; the base unit used internally is m³.

Notes

gal (US) to gal (Imp) FAQs

How do I convert US liquid gallons to Imperial gallons?

Multiply the number of US liquid gallons by 0.8326741846 to get Imperial gallons. For example, 25 gal (US) × 0.8326741846 = 20.8169 gal (Imp).

How many Imperial gallons are in one US liquid gallon?

1 gal (US) = 0.8326741846 gal (Imp) and 1 gal (Imp) = 1.200949926 gal (US). To go the other way, use the Imperial gallons to US liquid gallons converter.

How many Imperial gallons are in 10 US liquid gallons?

10 gal (US) = 8.32674 gal (Imp), rounded to 6 significant digits. Change the value in the converter above for any other amount.

Is the gal (US) to gal (Imp) conversion exact?

The ratio is exact by definition, but its decimal form does not end (0.832674184629… to 12 significant digits). The converter keeps full precision internally and rounds only the displayed answer, which you can set from 4 to 12 significant digits.

What is the difference between US liquid gallons and Imperial gallons?

The US liquid gallon is defined as 231 cubic inches, which is exactly 3.785411784 liters. It is used for fuel and liquids in the United States. The Imperial gallon is exactly 4.54609 liters, about 20 % larger than the US gallon. It is used in the UK, and for fuel economy figures in miles per Imperial gallon.

Is a US gallon the same as an Imperial gallon?

No. A US liquid gallon is 3.785411784 liters and an Imperial gallon is 4.54609 liters, so the Imperial gallon is about 20.1 % larger. This page uses the Imperial unit.

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