Convert MPG (UK) to Kilometers per Liter (mpg UK to km/L)
1 mile per imperial gallon (mpg (UK)) = 0.3540061899 kilometers per liter (km/L). 1 km/L = 2.824809363 mpg (UK). Example: 15 mpg (UK) = 15 × 0.3540061899 = 5.310092849 km/L.
Also searched as miles per imperial gallon to km/L, miles per imperial gallon in km/L, miles per imperial gallon into kilometers per liter, mpg UK to km/L, mpg UK in kilometers per liter, mpg UK into kilometer per liter, mile per imperial gallon to kilometer per liter, mpg UK to kilometers per liter converter, miles per imperial gallon to kilometres per litre and how many kilometers per liter in a mile per imperial gallon.
1 mpg (UK) = 0.3540061899 km/L
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk mile per imperial gallon to kilometer per liter converter to paste a column from Excel.
How to Convert MPG (UK) to Kilometer per Liter
- 1 mpg (UK) = 0.3540061899 km/L
- 1 km/L = 2.824809363 mpg (UK)
- Example: convert 15 mpg (UK) to km/L: 15 mpg (UK) = 15 × 0.3540061899 km/L = 5.310092849 km/L
Formula
km/L = mpg (UK) × 0.3540061899346
or km/L = mpg (UK) ÷ 2.824809363318
Derivation from SI units:
- 1 mpg (UK) = 1.609344 km ÷ 4.54609 L = 0.354006189… km/L.
- Distance in kilometres travelled on one litre of fuel.
Both units are defined exactly, so the factor is exact. MPG (UK) definition: mile per imperial gallon; Kilometer per Liter definition: kilometer per liter.
Worked examples
- A reading of 40 mpg (UK) converts to 14.1602476 km/L.
40 mpg (UK) × 0.3540061899 = 14.1602476 km/L - A value of 55 mpg (UK) is 19.47034045 km/L.
55 mpg (UK) × 0.3540061899 = 19.47034045 km/L
MPG (UK) to Kilometer per Liter conversion table
| MPG (UK) | Kilometers per Liter (km/L) |
|---|---|
| 20 mpg (UK) | 7.080123799 km/L |
| 30 mpg (UK) | 10.6201857 km/L |
| 35 mpg (UK) | 12.39021665 km/L |
| 40 mpg (UK) | 14.1602476 km/L |
| 45 mpg (UK) | 15.93027855 km/L |
| 50 mpg (UK) | 17.7003095 km/L |
| 55 mpg (UK) | 19.47034045 km/L |
| 60 mpg (UK) | 21.2403714 km/L |
| 70 mpg (UK) | 24.7804333 km/L |
| 80 mpg (UK) | 28.32049519 km/L |
Where it's used
MPG (UK) are used for UK car advertising and reviews, while kilometers per liter appear in car mileage in India (kmpl), Japan and Brazil. Both measure fuel economy (distance per volume of fuel), so the conversion is a fixed factor.
MPG (UK) to other fuel economy units
| Conversion | 1 mpg (UK) equals |
|---|---|
| mile per imperial gallon to kilometer per liter | 0.3540061899 km/L |
| mile per imperial gallon to liter per 100 kilometers | 282.4809363 L/100 km |
| mile per imperial gallon to mile per US gallon | 0.8326741846 mpg |
Frequently asked questions
How many kilometers per liter are in 1 mile per imperial gallon?
1 mpg (UK) = 0.3540061899 km/L.
How do I convert miles per imperial gallon to kilometers per liter?
Multiply the value in mpg (UK) by 0.3540061899, or divide it by 2.824809363. For example, 15 mpg (UK) × 0.3540061899 = 5.310092849 km/L.
Is the mpg (UK) to km/L conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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.)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (radian) and Table 8 (non-SI units accepted for use with the SI).
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). Convert MPG (UK) to Kilometers per Liter (mpg UK to km/L). Retrieved October 25, 2026, from https://scientificconverters.com/fuel-economy/miles-per-gallon-uk-to-kilometers-per-liter/
IEEE
Scientific Converters, "Convert MPG (UK) to Kilometers per Liter (mpg UK to km/L)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/fuel-economy/miles-per-gallon-uk-to-kilometers-per-liter/