MPG (UK)
Miles per imperial gallon is how fuel economy is quoted in the UK. The imperial gallon is 4.54609 L, about 1.2 US gallons, so UK mpg numbers are higher than US ones for the same car.
Symbol: mpg (UK) (ASCII: mpg UK)
Quantity: fuel economy (distance per volume of fuel)
SI relation: 1 mpg (UK) = 0.3540061899346 km/L (exact)
Derivation: 1 mpg (UK) = 1.609344 km ÷ 4.54609 L = 0.354006189… km/L.
Exact: yes, by definition
Typical uses
- UK car advertising and reviews
- Older Canadian ratings
- Comparing with L/100 km
Convert miles per imperial gallon to other units
| Conversion | 1 mpg (UK) equals | Reverse |
|---|---|---|
| mile per imperial gallon to liter per 100 kilometers | 282.4809363 L/100 km | liter per 100 kilometers to mile per imperial gallon |
| mile per imperial gallon to mile per US gallon | 0.8326741846 mpg | mile per US gallon to mile per imperial gallon |
| mile per imperial gallon to kilometer per liter | 0.3540061899 km/L | kilometer per liter to mile per imperial gallon |
Open the Fuel Economy Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "mile per gallon (U.K.)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). MPG (UK). Retrieved October 25, 2026, from https://scientificconverters.com/units/mile-per-gallon-uk/
IEEE
Scientific Converters, "MPG (UK)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/mile-per-gallon-uk/