This liters per 100 kilometers to miles per gallon converter switches between the two common ways of expressing fuel economy. Liters per 100 kilometers are part of the metric system used in most countries; miles per gallon are a US customary unit. The scales are inverse: a higher mpg figure is better, while a lower L/100 km figure is better, so 20 L/100 km equals 11.7607 mpg and 40 L/100 km equals 5.88036 mpg.
The formula is mpg = 235.215 ÷ L/100 km, using the US gallon (3.785 liters). UK miles per imperial gallon are about 20 percent higher for the same car, so check which gallon a figure uses before comparing. Everything is computed in your browser.
L/100 km to mpg formula
mpg = 235.215 ÷ L/100 km
Liters per 100 kilometers to Miles per gallon conversion table
| liters per 100 kilometers | miles per gallon | Rounded |
|---|---|---|
| 5 L/100 km | 47.0429 mpg | 47 |
| 6 L/100 km | 39.2024 mpg | 39.2 |
| 7 L/100 km | 33.6021 mpg | 33.6 |
| 8 L/100 km | 29.4018 mpg | 29.4 |
| 9 L/100 km | 26.135 mpg | 26.1 |
| 10 L/100 km | 23.5215 mpg | 23.5 |
| 12 L/100 km | 19.6012 mpg | 19.6 |
| 15 L/100 km | 15.681 mpg | 15.7 |
| 20 L/100 km | 11.7607 mpg | 11.8 |
| 25 L/100 km | 9.40858 mpg | 9.41 |
| 30 L/100 km | 7.84049 mpg | 7.84 |
| 35 L/100 km | 6.72042 mpg | 6.72 |
| 40 L/100 km | 5.88036 mpg | 5.88 |
| 45 L/100 km | 5.22699 mpg | 5.23 |
| 50 L/100 km | 4.70429 mpg | 4.7 |
| 60 L/100 km | 3.92024 mpg | 3.92 |
| 70 L/100 km | 3.36021 mpg | 3.36 |
| 80 L/100 km | 2.94018 mpg | 2.94 |
| 100 L/100 km | 2.35215 mpg | 2.35 |
Frequently asked questions
How many miles per gallon are in 30 liters per 100 kilometers?
30 L/100 km = 7.84049 mpg. Divide 235.215 by 30. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert liters per 100 kilometers to miles per gallon?
mpg = 235.215 ÷ L/100 km. The two units are reciprocal, which is why doubling one halves the other. Worked example: 8 L/100 km = 29.4018 mpg.
Is 50 L/100 km the same as 4.70429 mpg?
Yes. 50 L/100 km = 4.70429 mpg. Rounded to four decimals it is 4.704 mpg.
How do I convert miles per gallon back to liters per 100 kilometers?
The same formula works in both directions because the units are reciprocal: L/100 km = 235.215 ÷ mpg. The reverse page linked above has a table for mpg values.