local_gas_stationConverters
Fuel Efficiency Converter
Convert between MPG (US), MPG (UK), L/100km, and km/L. Essential for international travel and vehicle comparisons.
Convert between MPG (US), MPG (UK), L/100km, and km/L. Essential for international travel and vehicle comparisons.
The Fuel Efficiency Converter instantly converts between the major fuel economy units used around the world: miles per gallon (US and Imperial UK), litres per 100 kilometres (L/100km), and kilometres per litre (km/L). These units are not interchangeable by simple multiplication — L/100km is an inverse measurement, meaning a lower number represents better efficiency, whereas MPG and km/L are direct measurements where higher means better. This makes cross-unit comparisons genuinely confusing without a converter. The tool is useful when comparing a car's fuel economy listed in a foreign spec sheet, planning a road trip budget across countries with different fuel pricing conventions, or simply understanding whether a new vehicle is more or less efficient than your current one. All conversions happen instantly in the browser with no server calls required.
Enter a fuel efficiency value in any of the input fields and the remaining units update automatically in real time. You can start from any unit — MPG (US), MPG (UK), L/100km, or km/L — and all other fields will reflect the equivalent value instantly.