Fuel Economy Converter
Convert between MPG (US/UK), km/L and L/100km.
How It Works
Enter a value
Type the amount you want to convert into the From field.
Pick your units
Choose the source unit and the target fuel economy unit from the dropdowns.
Read the result
The converted value appears instantly, plus a table of all other units.
The Fuel Economy Converter instantly converts between 4 different fuel economy units. Convert between MPG (US/UK), km/L and L/100km. All calculations happen locally in your browser, so conversions are immediate and your data never leaves your device.
Need a different measurement? Browse the full set of converters — length, weight, volume, temperature, speed, area, pressure, energy, power, data and more — from the unit converter hub.
Frequently Asked Questions
How do I convert miles / gallon (us) to liters / 100 km?
Enter a value in the "From" box, make sure the unit is set to Miles / gallon (US), then choose Liters / 100 km in the "To" box. The converted result appears instantly, along with the value expressed in every other fuel economy unit.
What fuel economy units are supported?
This converter supports 4 units: Miles / gallon (US), Miles / gallon (UK), Kilometer / liter, Liters / 100 km.
Is the Fuel Economy converter free and accurate?
Yes. It is completely free, requires no sign-up, and runs entirely in your browser using internationally standardized conversion factors, so results are accurate to many significant figures.
How is MPG converted to L/100km?
Fuel economy is inverse: L/100km = 235.215 ÷ MPG (US) or 282.481 ÷ MPG (UK). A higher MPG means a lower L/100km.
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