Fuel Economy Converter — MPG, L/100km, km/L
The Fuel Economy Converter converts between all major fuel efficiency units — miles per gallon (US and UK), litres per 100 km, kilometres per litre, and miles per litre. Whether you are comparing car specs from different countries, planning a road trip budget, or evaluating fleet efficiency, this free tool converts instantly between all common formats.
How to Use This Calculator
- 1
Enter the fuel economy value you want to convert.
- 2
Select the unit you are converting from (e.g. MPG US).
- 3
Select the unit you want to convert to (e.g. L/100km).
- 4
Click Convert to see the result instantly.
Frequently Asked Questions
Divide 235.21 by the MPG value to get L/100km. For example, 30 MPG = 235.21 ÷ 30 = 7.84 L/100km. Note: this applies to US gallons. For UK MPG, divide 282.48 instead.