VOLUME CONVERSION
US gallon to Imperial gallon.
Convert us gallon (gal (US)) to imperial gallon (gal (UK)), with the math explained.
1 gal (US) = 0.8326741846 gal (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 gallon
Multiply your us gallon value by 0.832674184629 to get the equivalent in imperial gallon. Both units are normalized through the liter.
gal (UK) = gal (US) × 0.832674184610 gal (US) = 8.32674184629 gal (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 gal (UK) conversion table
| US gallon (gal (US)) | Imperial gallon (gal (UK)) |
|---|---|
| 1 gal (US) | 0.832674184629 gal (UK) |
| 2 gal (US) | 1.66534836926 gal (UK) |
| 5 gal (US) | 4.16337092314 gal (UK) |
| 10 gal (US) | 8.32674184629 gal (UK) |
| 20 gal (US) | 16.6534836926 gal (UK) |
| 50 gal (US) | 41.6337092314 gal (UK) |
| 100 gal (US) | 83.2674184629 gal (UK) |
| 500 gal (US) | 416.337092314 gal (UK) |
| 1,000 gal (US) | 832.674184629 gal (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 gallon
The imperial gallon (gal (UK)) is a unit of volume. One imperial gallon equals 4.54609 liter (base unit) in this calculator.
All imperial gallon conversionsCommon questions
What is 1 gal (US) in gal (UK)?
One us gallon equals 0.832674184629 gal (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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