Fuel economy converter

mpg (US/UK), L/100km, and km/L — convert between the ways the world reports fuel economy.

Convert between all four fuel-economy units at once — US and imperial MPG differ.

MPG (US) uses the 3.785 L gallon; imperial uses 4.546 L. L/100 km runs the other way — lower is better.

Everything runs in this browser.

How to use

  1. Enter a fuel-economy value.
  2. Pick its unit.
  3. Read all four units at once.

What it supports

US mpg, UK mpg, L/100km, km/L; positive values up to 1e6. L/100km is an inverse measure — it falls as the others rise.

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