How to convert miles per US gallon to miles per imperial gallon
To convert miles per US gallon (mpg) to miles per imperial gallon (mpg (UK)), convert through the base unit (kmpl).
mpg (UK) = f(mpg)
Example: 30 mpg = 36.02849777 mpg (UK).
Miles per US Gallon to Miles per Imperial Gallon conversion table
| Miles per US Gallon | Miles per Imperial Gallon |
|---|---|
| 3 mpg | 3.6028498 mpg (UK) |
| 4 mpg | 4.8037997 mpg (UK) |
| 5 mpg | 6.0047496 mpg (UK) |
| 6 mpg | 7.2056996 mpg (UK) |
| 7 mpg | 8.4066495 mpg (UK) |
| 8 mpg | 9.6075994 mpg (UK) |
| 10 mpg | 12.009499 mpg (UK) |
| 12 mpg | 14.411399 mpg (UK) |
| 15 mpg | 18.014249 mpg (UK) |
| 20 mpg | 24.018999 mpg (UK) |
| 25 mpg | 30.023748 mpg (UK) |
| 30 mpg | 36.028498 mpg (UK) |
| 35 mpg | 42.033247 mpg (UK) |
| 40 mpg | 48.037997 mpg (UK) |
| 50 mpg | 60.047496 mpg (UK) |
| 60 mpg | 72.056996 mpg (UK) |
Converting miles per imperial gallon back to miles per US gallon
Use the reverse formula. See the Miles per Imperial Gallon to Miles per US Gallon converter, or press the swap button above.
About the units
Mile per US gallon (mpg)
Miles driven per US gallon, the fuel economy figure on US window stickers.
Mile per imperial gallon (mpg (UK))
Miles per imperial gallon, used in the UK. About 20% higher than the US figure for the same car.
Fuel economy is either distance per volume (mpg, km/L), where higher is better, or volume per distance (L/100 km), where lower is better. Converting between the two families is an inversion, not a multiplication. US and UK mpg differ because their gallons differ.
Questions and answers
How do I convert miles per US gallon to miles per imperial gallon?
To convert miles per US gallon to miles per imperial gallon, convert through the base unit (kmpl). The formula is mpg (UK) = f(mpg). For example, 30 mpg = 36.028498 mpg (UK).
What is 30 mpg in mpg (UK)?
30 miles per US gallon is 36.02849777 miles per imperial gallon.
Why does L/100 km go down when mpg goes up?
mpg measures distance per fuel (higher is better) while L/100 km measures fuel per distance (lower is better). One is the reciprocal of the other, so the conversion divides rather than multiplies.
Does this mpg to mpg (UK) 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.