Tools / Converters

Fuel Economy Converter

Compare km/L, mpg, and L/100km — convert instantly.

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Tool info

Category Converters

Processing Directly in your browser

Data storage Not stored

Updated 2026-08-30

How to use

Enter the fuel economy value you want to convert.

Pick the source and target units to see the result instantly.

Tap the ⇄ button to swap the source and target units.

FAQ

자주 묻는 질문

Q1. Is L/100km calculated differently from the others?

Yes. With km/L or mpg, a higher number means better efficiency, but with L/100km a lower number is better, so it uses a reciprocal calculation (100 ÷ value).

Q2. Are US mpg and UK mpg different?

Yes. A US gallon (3.78541L) and a UK gallon (4.54609L) differ in size, so the same mpg number means a different real fuel economy. This tool keeps the two separate.

Q3. What is 14 km/L in mpg?

Pick km/L as the source and mpg (US) as the target, enter 14, and you get the result instantly.

Q4. How many decimal places are shown?

Results are shown with up to 6 decimal places. Very small discrepancies can come from rounding.

Q5. Is my input sent to a server?

No. All calculations happen entirely in your browser and are never sent to or stored on a server.

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