MPG to KM/L Converter
Convert miles per gallon (US) to kilometres per litre in your browser, with a full reference table and the formula behind it. Free, instant, no sign-up.
How to convert miles per gallon (US) to kilometres per litre
1 mpg = 0.425144 km/l
Fuel economy figures do not scale in a straight line when one side is measured per distance and the other per volume, so use the table or the converter rather than doubling a number in your head. The converter above is already set to miles per gallon (US) and kilometres per litre, so you can type any value and read the answer straight away.
MPG to KM/L conversion table
Common values, worked out in advance:
| Miles per gallon (us) (mpg) | Kilometres per litre (km/l) |
|---|---|
| 5 mpg | 2.1257 km/l |
| 10 mpg | 4.2514 km/l |
| 15 mpg | 6.3772 km/l |
| 20 mpg | 8.5029 km/l |
| 25 mpg | 10.6286 km/l |
| 30 mpg | 12.7543 km/l |
| 35 mpg | 14.88 km/l |
| 40 mpg | 17.0057 km/l |
| 50 mpg | 21.2572 km/l |
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Frequently asked questions
How many kilometres per litre are in 1 mpg?
One mpg is 0.425144 km/l. The table above covers the values people look up most often.
What is the formula to convert miles per gallon (US) to kilometres per litre?
1 mpg = 0.425144 km/l. Fuel economy figures do not scale in a straight line when one side is measured per distance and the other per volume, so use the table or the converter rather than doubling a number in your head.
Is this mpg to km/l converter accurate?
Yes. It uses the exact internationally defined conversion factors and calculates in your browser, so nothing is rounded until the result is displayed.
Can I convert kilometres per litre back to miles per gallon (US) here?
Yes. Use the swap button in the converter to reverse the direction, or pick any other pair of units from the two dropdowns.