How to convert US gallons to imperial gallons
To convert US gallons (gal) to imperial gallons (imp gal), multiply the value in US gallons by 0.832674184629.
imp gal = gal × 0.832674184629
Example: 10 gal = 8.326741846 imp gal.
You can also type 10 gal to imp gal into the smart calculator, or mix units: 1 gal + 1 imp gal.
US Gallons to Imperial Gallons conversion table
| US Gallons | Imperial Gallons |
|---|---|
| 0.01 gal | 0.0083267418 imp gal |
| 0.1 gal | 0.083267418 imp gal |
| 0.25 gal | 0.20816855 imp gal |
| 0.5 gal | 0.41633709 imp gal |
| 1 gal | 0.83267418 imp gal |
| 2 gal | 1.6653484 imp gal |
| 3 gal | 2.4980226 imp gal |
| 4 gal | 3.3306967 imp gal |
| 5 gal | 4.1633709 imp gal |
| 6 gal | 4.9960451 imp gal |
| 7 gal | 5.8287193 imp gal |
| 8 gal | 6.6613935 imp gal |
| 9 gal | 7.4940677 imp gal |
| 10 gal | 8.3267418 imp gal |
| 12 gal | 9.9920902 imp gal |
| 15 gal | 12.490113 imp gal |
| 20 gal | 16.653484 imp gal |
| 25 gal | 20.816855 imp gal |
| 30 gal | 24.980226 imp gal |
| 40 gal | 33.306967 imp gal |
| 50 gal | 41.633709 imp gal |
| 60 gal | 49.960451 imp gal |
| 75 gal | 62.450564 imp gal |
| 100 gal | 83.267418 imp gal |
| 250 gal | 208.16855 imp gal |
| 500 gal | 416.33709 imp gal |
| 1,000 gal | 832.67418 imp gal |
Converting imperial gallons back to US gallons
1 imp gal = 1.200949926 gal. See the Imperial Gallons to US Gallons converter, or press the swap button above.
About the units
US gallon (gal)
Exactly 231 cubic inches, about 3.785 liters.
Imperial gallon (imp gal)
Exactly 4.54609 liters, used in the UK and some Commonwealth countries.
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 imperial gallons are in a US gallon?
One US gallon (gal) equals 0.8326741846 imperial gallons (imp gal).
How do I convert US gallons to imperial gallons?
To convert US gallons to imperial gallons, multiply the value in US gallons by 0.832674184629. The formula is imp gal = gal × 0.832674184629. For example, 10 gal = 8.3267418 imp gal.
What is 10 gal in imp gal?
10 US gallons is 8.326741846 imperial gallons.
Which is bigger, a US gallon or a imperial 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 gal to imp 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.