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Converters

Fuel Economy Converter

Convert fuel efficiency between L/100 km, km/L, US mpg and imperial mpg.

Conversion factors explained belowNo live data needed

Value & units

Runs on your device

CONVERTED VALUE

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this converter

  1. Enter fuel economy, from, to.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

L/100 km = 100 ÷ km/L. US mpg = 235.214583333… ÷ L/100 km. Imperial mpg uses 282.480936331… instead.

A WORKED EXAMPLE

8 L/100 km equals 12.5 km/L and about 29.40 US mpg.

What to keep in mind

Consumption and distance-per-fuel are reciprocal measures. Zero values are rejected. US and imperial gallons differ; no driving conditions are modeled.

Common questions

Does a higher value mean better efficiency?

For mpg or km/L, yes. For L/100 km, lower values mean less fuel consumed per distance.

Why are imperial mpg values higher?

An imperial gallon contains more fuel than a US liquid gallon, so the same vehicle travels farther per gallon.

Methodology maintained by ClarityKit. How these tools are built and checked.