Fuel economy converter
US mpg, UK mpg, litres per 100 km and km per litre. Type in either box and the other updates.
30 mpg = 7.8405 L/100 km
The same value in every unit
| Unit | Value |
|---|---|
| Miles per gallon (US) (mpg) | 30 |
| Miles per gallon (UK) (UK mpg) | 36.0285 |
| Kilometres per litre (km/L) | 12.7543 |
| Litres per 100 km (L/100 km) | 7.8405 |
Fuel economy conversions
How it’s calculated
Miles per gallon and km per litre measure distance per fuel, while L/100 km measures fuel per distance, so one is the reciprocal of the other: a higher mpg means a lower L/100 km. L/100 km = 235.215 ÷ US mpg, or 282.481 ÷ UK mpg. UK mpg is higher than US mpg for the same car because the UK gallon is bigger.