Miles per gallon (mpg) to Miles per UK gallon (mpg (imp)) Conversion
Miles per gallon
Miles per gallon (mpg) is the US customary measure of fuel economy, expressing how many miles a vehicle can travel on one US gallon (3.785 L) of fuel. Higher values indicate greater efficiency. It is the official fuel economy standard in the United States and is published on all new vehicle window stickers (Monroney labels) under EPA ratings. To convert US mpg to litres per 100 km, divide 235.215 by the mpg value — so 30 mpg equals approximately 7.84 L/100km. US mpg should not be confused with UK mpg, which uses the larger imperial gallon and produces higher numbers for the same vehicle.
Miles per UK gallon
Miles per UK gallon (mpg imp) measures fuel economy using the imperial gallon (4.54609 L), which is approximately 20% larger than the US gallon. As a result, the same vehicle achieves a higher mpg figure by the UK standard than by the US standard — a 40 mpg UK figure equals approximately 33.3 mpg US for the same vehicle. The UK mpg is still used in British automotive journalism and official government fuel economy testing, though EU-harmonised L/100km data is increasingly common since Brexit.
| Miles per gallon (mpg) | Miles per UK gallon (mpg (imp)) |
|---|---|
| 0.1 mpg | 0.12009499109833 mpg (imp) |
| 1 mpg | 1.2009499109833 mpg (imp) |
| 2 mpg | 2.4018998219665 mpg (imp) |
| 3 mpg | 3.6028497329498 mpg (imp) |
| 5 mpg | 6.0047495549163 mpg (imp) |
| 10 mpg | 12.009499109833 mpg (imp) |
| 20 mpg | 24.018998219665 mpg (imp) |
| 30 mpg | 36.028497329498 mpg (imp) |
| 50 mpg | 60.047495549163 mpg (imp) |
| 100 mpg | 120.09499109833 mpg (imp) |
| 1000 mpg | 1200.9499109833 mpg (imp) |
Frequently Asked Questions (FAQ)
How many miles per UK gallon are in 1 miles per gallon?
1 miles per gallon (mpg) is exactly 1.2009 miles per UK gallon (mpg (imp)).
How do I convert miles per gallon to miles per UK gallon?
Multiply the value in miles per gallon by 1.2009 to get the result in miles per UK gallon. Or use the converter above — type any number and see the result instantly.