Fuel Economy Converter
Converts fuel economy between US miles per gallon, imperial miles per gallon, litres per 100 km, and kilometres per litre. Enter a number and a unit, such as "30 mpg", "30 mpg_uk", "8 L/100km", or "12.5 km/L".
Converts fuel economy between US miles per gallon, imperial miles per gallon, litres per 100 km, and kilometres per litre. Enter a number and a unit, such as "30 mpg", "30 mpg_uk", "8 L/100km", or "12.5 km/L".
US and imperial gallons differ, so the same car reads about 20 percent higher in imperial mpg. Say which you mean with mpg or mpg_uk.
Use cases
- Comparing a US car's rating with a European one
- Converting a rental car's L/100km figure into mpg
Examples
Thirty US mpg
30 mpg
{"mpg_us": 30.0, "mpg_uk": 36.0285, "km_l": 12.7543, "l_100km": 7.8405}FAQ
Is my data sent to a server?
Yes — the conversion runs on the server for this tool.
Why do mpg and L/100km move in opposite directions?
They measure opposite things. Miles per gallon is distance per fuel, so higher is better; litres per 100 km is fuel per distance, so lower is better. The two are reciprocals of each other.
What is the difference between US and imperial mpg?
The gallon. A US gallon is 3.785 litres and an imperial gallon 4.546, so an imperial mpg figure is about 1.2 times the US one for the same car.