Fuel Economy Converter

Convert fuel efficiency between km/L, US mpg, UK mpg, and liters per 100 kilometers.

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Vehicle comparison utility

Interactive calculator

Convert fuel economy units

Translate fuel efficiency between km/L, US mpg, UK mpg, and liters per 100 kilometers.

Fuel economy valueEnter the fuel economy figure to convert

From unit

To unit

Results

Result (L/100km)

7.840486

30 mpg US = 7.840486 L/100km

How to use it

01Enter the vehicle efficiency or consumption figure.
02Choose the source fuel economy unit and the target unit.
03Use the converted result to compare cars, trips, or published vehicle ratings.

Result guide

Liters per 100 km represent fuel consumption, so that unit converts inversely compared with mpg or km/L.
The page supports both US and UK mpg because the gallon sizes are different.
This is a unit converter, not a trip-cost or fuel-budget estimator.

Why this page matters

Fuel-economy conversion is useful for comparing cars across countries because different markets describe the same efficiency using different systems.

A useful page should support both efficiency-style units like mpg and consumption-style units like liters per 100 km, because both are widely used.

Frequently asked questions

Because the US gallon and the UK imperial gallon are different sizes, so the same mpg number does not mean the same efficiency.

Because it expresses fuel consumed per distance instead of distance traveled per fuel unit.

Yes. That is one of its most practical uses because different markets publish fuel economy differently.

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