How to convert imperial gallons to US gallons
To convert imperial gallons (imp gal) to US gallons (gal), multiply the value in imperial gallons by 1.2009499255.
gal = imp gal × 1.2009499255
Example: 10 imp gal = 12.00949926 gal.
You can also type 10 imp gal to gal into the smart calculator, or mix units: 1 imp gal + 1 gal.
Imperial Gallons to US Gallons conversion table
| Imperial Gallons | US Gallons |
|---|---|
| 0.01 imp gal | 0.012009499 gal |
| 0.1 imp gal | 0.12009499 gal |
| 0.25 imp gal | 0.30023748 gal |
| 0.5 imp gal | 0.60047496 gal |
| 1 imp gal | 1.2009499 gal |
| 2 imp gal | 2.4018999 gal |
| 3 imp gal | 3.6028498 gal |
| 4 imp gal | 4.8037997 gal |
| 5 imp gal | 6.0047496 gal |
| 6 imp gal | 7.2056996 gal |
| 7 imp gal | 8.4066495 gal |
| 8 imp gal | 9.6075994 gal |
| 9 imp gal | 10.808549 gal |
| 10 imp gal | 12.009499 gal |
| 12 imp gal | 14.411399 gal |
| 15 imp gal | 18.014249 gal |
| 20 imp gal | 24.018999 gal |
| 25 imp gal | 30.023748 gal |
| 30 imp gal | 36.028498 gal |
| 40 imp gal | 48.037997 gal |
| 50 imp gal | 60.047496 gal |
| 60 imp gal | 72.056996 gal |
| 75 imp gal | 90.071244 gal |
| 100 imp gal | 120.09499 gal |
| 250 imp gal | 300.23748 gal |
| 500 imp gal | 600.47496 gal |
| 1,000 imp gal | 1,200.9499 gal |
Converting US gallons back to imperial gallons
1 gal = 0.8326741846 imp gal. See the US Gallons to Imperial Gallons converter, or press the swap button above.
About the units
Imperial gallon (imp gal)
Exactly 4.54609 liters, used in the UK and some Commonwealth countries.
US gallon (gal)
Exactly 231 cubic inches, about 3.785 liters.
Volume is the space a substance occupies. The SI unit is the cubic meter, but the liter (one cubic decimeter) is used far more often. US and imperial units share names but not sizes: a US gallon is 3.785 liters while an imperial gallon is 4.546 liters.
Questions and answers
How many US gallons are in a imperial gallon?
One imperial gallon (imp gal) equals 1.200949926 US gallons (gal).
How do I convert imperial gallons to US gallons?
To convert imperial gallons to US gallons, multiply the value in imperial gallons by 1.2009499255. The formula is gal = imp gal × 1.2009499255. For example, 10 imp gal = 12.009499 gal.
What is 10 imp gal in gal?
10 imperial gallons is 12.00949926 US gallons.
Which is bigger, a imperial gallon or a US gallon?
A imperial gallon is bigger: 1 imp gal = 1.200949926 gal.
Is a US gallon the same as a UK gallon?
No. A US gallon is 3.785 liters and an imperial (UK) gallon is 4.546 liters, about 20% more. US and UK pints and fluid ounces differ too.
Does this imp gal to gal converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.