Miles per Gallon (Imperial) to Kilometers per Liter Converter
A value of 1 Miles per Gallon (Imperial) converts to 0.3540061904 Kilometers per Liter; the two units measure the same quantity on different scales, so the relationship is not a fixed factor. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
km-l = convert(mpg-imp → L100km → km-l)
Convert Miles per Gallon (Imperial) to the base unit (L100km), then convert to Kilometers per Liter.
Example Conversions
0 Miles per Gallon (Imperial) (mpg-imp)
Invalid Kilometers per Liter (km-l)
1 Miles per Gallon (Imperial) (mpg-imp)
0.3540061904 Kilometers per Liter (km-l)
25 Miles per Gallon (Imperial) (mpg-imp)
8.850154759 Kilometers per Liter (km-l)
100 Miles per Gallon (Imperial) (mpg-imp)
35.40061904 Kilometers per Liter (km-l)
212 Miles per Gallon (Imperial) (mpg-imp)
75.04931235 Kilometers per Liter (km-l)
Conversion Table
| Miles per Gallon (Imperial) (mpg-imp) | Kilometers per Liter (km-l) |
|---|---|
| 0 | Invalid |
| 1 | 0.3540061904 |
| 10 | 3.540061904 |
| 20 | 7.080123807 |
| 25 | 8.850154759 |
| 32 | 11.32819809 |
| 37 | 13.09822904 |
| 50 | 17.70030952 |
| 75 | 26.55046428 |
| 100 | 35.40061904 |
| 212 | 75.04931235 |
| 273.15 | 96.69679089 |
How to Convert Manually
Use these steps to convert Miles per Gallon (Imperial) values to Kilometers per Liter without the calculator.
- Write down the value in Miles per Gallon (Imperial) (mpg-imp) that you want to convert.
- Apply the formula: km-l = convert(mpg-imp → L100km → km-l).
- For example, converting 10 Miles per Gallon (Imperial) gives 3.540061904 Kilometers per Liter.
- Label the result as Kilometers per Liter (km-l).
About Miles per Gallon (Imperial) and Kilometers per Liter
Miles per imperial gallon uses the larger UK gallon (4.54609 L), so the same car scores about 20% higher than in US mpg. UK car reviews and older Commonwealth figures use it. Kilometers per liter measures distance per unit fuel in metric terms — higher is better. Japan, India, and much of Asia and Latin America quote car economy in km/L. The two units are related by a formula rather than a fixed factor; a value of 1 Miles per Gallon (Imperial) corresponds to 0.3540061904 Kilometers per Liter. Miles per Gallon (Imperial) to Kilometers per Liter conversion comes up most often in UK car reviews and adverts and in comparing UK and US economy figures, typically when figures need restating for car economy in Japan, India, and Asia.
Precision and Rounding: Fuel economy units are reciprocal of each other — consumption (L/100 km) falls as efficiency (mpg, km/L) rises — so conversions are formula-based, not simple factors, and small mpg differences matter more at low values than high ones. One decimal place is standard for window stickers and trip computers.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Miles per Gallon (Imperial) equals 5.310092855 Kilometers per Liter.
15 mpg-imp -> 5.310092855 km-l
FAQ
How do I convert Miles per Gallon (Imperial) to Kilometers per Liter?
Convert Miles per Gallon (Imperial) to the base unit (L100km), then convert to Kilometers per Liter.
What is the formula for Miles per Gallon (Imperial) to Kilometers per Liter?
The formula is km-l = convert(mpg-imp → L100km → km-l).
How many Kilometers per Liter are in 1 Miles per Gallon (Imperial)?
1 Miles per Gallon (Imperial) equals 0.3540061904 Kilometers per Liter.
Can I convert Kilometers per Liter back to Miles per Gallon (Imperial)?
Yes. 1 Kilometers per Liter equals 2.82480936 Miles per Gallon (Imperial), and the related converter can reverse the calculation.
What are common names for Miles per Gallon (Imperial) and Kilometers per Liter?
Miles per Gallon (Imperial) is shown as mpg-imp and may also be searched as mpg imp, imperial mpg, UK mpg. Kilometers per Liter is shown as km-l and may also be searched as km/L, km/l, kilometres per litre.
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