VOLUME CONVERSION
Imperial gallon to US gallon.
Convert imperial gallon (gal (UK)) to us gallon (gal (US)), with the math explained.
1 gal (UK) = 1.200949926 gal (US)
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 imperial gallon to us gallon
Multiply your imperial gallon value by 1.2009499255 to get the equivalent in us gallon. Both units are normalized through the liter.
gal (US) = gal (UK) × 1.20094992610 gal (UK) = 12.009499255 gal (US)
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 (UK) to gal (US) conversion table
| Imperial gallon (gal (UK)) | US gallon (gal (US)) |
|---|---|
| 1 gal (UK) | 1.2009499255 gal (US) |
| 2 gal (UK) | 2.40189985101 gal (US) |
| 5 gal (UK) | 6.00474962752 gal (US) |
| 10 gal (UK) | 12.009499255 gal (US) |
| 20 gal (UK) | 24.0189985101 gal (US) |
| 50 gal (UK) | 60.0474962752 gal (US) |
| 100 gal (UK) | 120.09499255 gal (US) |
| 500 gal (UK) | 600.474962752 gal (US) |
| 1,000 gal (UK) | 1,200.9499255 gal (US) |
About 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 conversionsAbout 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 conversionsCommon questions
What is 1 gal (UK) in gal (US)?
One imperial gallon equals 1.2009499255 gal (US). 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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