Conversion Tools

Fuel Economy Converter

Convert fuel economy across mpg US, mpg UK, L/100km, and km/L.

Formula reviewed: 2026-02-14 Conversion Tools

Fuel Economy Converter translates efficiency values across mpg US, mpg UK, L/100km, and km/L so vehicle data from different regions can be compared directly. It is useful when evaluating cars, analyzing fleet consumption, or reading international specs where unit conventions differ. The tool handles reciprocal unit behavior correctly and shows all supported equivalents in one output panel. This helps avoid common manual-conversion mistakes, especially between mpg and L/100km. Use it to normalize efficiency figures before making purchasing or operational decisions.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

How to use this tool

Enter fuel economy value and choose the source unit.
Select target unit and click `Convert`.
Use the all-units table to compare efficiency across regional standards.