Fuel Economy Converter — Free Online Tool

Convert MPG (US/UK), km/L and L/100km for fuel efficiency. Fuel Economy Converter is a free online tool from the ToolsRift Unit Converters collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

Loading Fuel Economy Converter…

How to use Fuel Economy Converter

  1. Open the Fuel Economy Converter above — it loads instantly, no account needed.
  2. Enter or upload your input. Everything is processed locally on your device.
  3. Get your result immediately and copy or download it with one click.

Frequently asked questions

How do I convert MPG to L/100km?

Divide 235.215 by the US MPG value. For example, 30 US MPG ≈ 7.84 L/100km.

Why are US and UK MPG different?

A US gallon (3.785 L) is smaller than a UK gallon (4.546 L), so the same car shows a higher UK MPG number than US MPG for identical fuel use.

What does lower L/100km mean?

L/100km measures fuel used per distance, so a lower number means better fuel economy — unlike MPG, where higher is better.

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