Fuel Economy
MPG to L/100km
Convert between miles per gallon and litres per 100 km. These are inversely related — higher MPG means lower L/100km.
How this is calculated
- L/100km = 235.214583 ÷ mpg (US)
- L/100km = 282.480936 ÷ mpg (UK)
- L/100km = 100 ÷ km/L
The relationship is inverse, not proportional: doubling MPG halves L/100km. That also means 0 has no conversion.
A UK gallon is larger than a US one, so the same car scores about 20% more MPG in imperial figures.
Checked against known values
- 235.214583 mpg (US) = 1 L/100km
- 30 mpg (US) = 7.840486 L/100km
- 10 km/L = 10 L/100km
- 1 mpg (UK) = 0.832674 mpg (US)