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Fuel economy converter

Miles per Imperial Gallon to Miles per US Gallon (mpg (UK) to mpg)

Type in either box: it converts both ways, accepts sums like 12*3, and shows every other fuel economy unit too.

30 mpg (UK) = 24.9802 mpg. To convert, convert through the base unit (kmpl): mpg = f(mpg (UK)).

How to convert miles per imperial gallon to miles per US gallon

To convert miles per imperial gallon (mpg (UK)) to miles per US gallon (mpg), convert through the base unit (kmpl).

mpg = f(mpg (UK))

Example: 30 mpg (UK) = 24.98022554 mpg.

Miles per Imperial Gallon to Miles per US Gallon conversion table

Miles per Imperial Gallon to Miles per US Gallon
Miles per Imperial GallonMiles per US Gallon
3 mpg (UK)2.4980226 mpg
4 mpg (UK)3.3306967 mpg
5 mpg (UK)4.1633709 mpg
6 mpg (UK)4.9960451 mpg
7 mpg (UK)5.8287193 mpg
8 mpg (UK)6.6613935 mpg
10 mpg (UK)8.3267418 mpg
12 mpg (UK)9.9920902 mpg
15 mpg (UK)12.490113 mpg
20 mpg (UK)16.653484 mpg
25 mpg (UK)20.816855 mpg
30 mpg (UK)24.980226 mpg
35 mpg (UK)29.143596 mpg
40 mpg (UK)33.306967 mpg
50 mpg (UK)41.633709 mpg
60 mpg (UK)49.960451 mpg

Converting miles per US gallon back to miles per imperial gallon

Use the reverse formula. See the Miles per US Gallon to Miles per Imperial Gallon converter, or press the swap button above.

About the units

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.

Mile per US gallon (mpg)

Miles driven per US gallon, the fuel economy figure on US window stickers.

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 imperial gallon to miles per US gallon?

To convert miles per imperial gallon to miles per US gallon, convert through the base unit (kmpl). The formula is mpg = f(mpg (UK)). For example, 30 mpg (UK) = 24.980226 mpg.

What is 30 mpg (UK) in mpg?

30 miles per imperial gallon is 24.98022554 miles per US 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 (UK) to mpg 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.