MPG to L/100 km Converter (US & UK)

Why mpg and L/100 km are inverse

Miles per gallon measures distance per unit of fuel, while liters per 100 km measures fuel per unit of distance. That is why a higher mpg is better but a lower L/100 km is better, and why the conversion is a division: L/100 km = 235.215 ÷ mpg (US).

US and UK gallons are different

A US gallon is 3.785 liters and an imperial (UK) gallon is 4.546 liters. The same car therefore shows about 20% more mpg in the UK than in the US: 30 mpg (US) is 36 mpg (UK). Always check which gallon a figure uses.

Formulas

L/100 km = 235.215 ÷ mpg (US) = 282.481 ÷ mpg (UK). km/L = 100 ÷ L/100 km. mpg (US) = 2.352 × km/L.

How do you convert mpg to L/100 km?

Divide 235.215 by the US mpg value, or 282.481 by the UK mpg value. For example, 30 mpg (US) = 7.84 L/100 km.

What is 40 mpg in L/100 km?

40 mpg (US) is 5.88 L/100 km; 40 mpg (UK) is 7.06 L/100 km.

What is 8 L/100 km in mpg?

8 L/100 km is 29.4 mpg (US) or 35.3 mpg (UK).

Is a higher L/100 km better?

No. L/100 km is fuel used per distance, so a lower number means better fuel economy.