Fuel Economy Converter
Convert mpg, L/100 km and km/L.
An inverse measure: 5 L/100 km is twice as efficient as 10 L/100 km, not half.
US mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller.
1 liter per 100 kilometers equals 235.215 miles per US gallon
About fuel economy units
Fuel economy is measured two opposite ways. Distance per volume — miles per gallon, kilometres per litre — goes up as a car gets more efficient. Volume per distance — litres per 100 km — goes down. Because they are reciprocals, converting between them is not a simple multiplication, and the difference between US and imperial gallons adds a second trap.
Distance per fuel (mpg or km/L) increases with economy; fuel per distance (L/100 km) decreases. Converting between these forms is reciprocal, requires a positive value and depends on whether a gallon is US or Imperial.
Popular conversions
The conversions people look up most in this category.
- Kilometers per liter to miles per US gallon
- Miles per US gallon to kilometers per liter
- Kilometers per liter to miles per imperial gallon
- Liters per 100 kilometers to miles per US gallon
- Miles per US gallon to liters per 100 kilometers
- Miles per imperial gallon to kilometers per liter
- Liters per 100 kilometers to miles per imperial gallon
- Miles per imperial gallon to liters per 100 kilometers
All units
Compare unit values in the base unit. Numbers are rounded to 8 significant digits; conventions and assumptions appear beside the units.
| Unit | Symbol | 1 unit in km/L |
|---|---|---|
| kilometer per liter | km/L | 1 |
| liter per 100 kilometersAn inverse measure: 5 L/100 km is twice as efficient as 10 L/100 km, not half. | L/100 km | 100 |
| mile per US gallonUS mpg figures are about 17% lower than imperial mpg for the same car, because the US gallon is smaller. | mpg (US) | 0.42514371 |
| mile per imperial gallon | mpg (imp) | 0.35400619 |
| mile per liter | mi/L | 1.609344 |
| US gallon per 100 milesAn inverse measure, like L/100 km. | gal/100 mi | 42.514371 |
| kilometer per US gallon | km/gal | 0.26417205 |
All conversion pages
Each page has the formula, worked examples and a reference table.