Fuel Economy Converter
Convert fuel efficiency values bidirectionally across km/L, L/100km, and MPG
A utility to convert fuel efficiency units bidirectionally among km/L, L/100km, and MPG (US/UK). Easily calculate fuel consumption standards across countries.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Enter a value in any of the fuel efficiency input fields.
- Select the desired output standard or view the converted values instantly.
- Compare fuel efficiency standards directly on the visual conversion grid.
FAQ
- What is the difference between US MPG and UK MPG?
- The UK gallon is larger than the US gallon (approx 4.54L vs 3.78L). Therefore, UK MPG is higher for the same fuel efficiency.
- Does a higher number always mean better fuel economy, even for L/100km?
- No — for km/L (and MPG), a bigger number means better mileage, but for L/100km it's the opposite: a smaller number means the car uses less fuel. Keep that direction in mind when comparing units.
- Does a higher number always mean better fuel economy, even for L/100km?
- No — for km/L (and MPG), a bigger number means better mileage, but for L/100km it's the opposite: a smaller number means the car uses less fuel. Keep that direction in mind when comparing units.