Fuel Economy Unit Converter

Convert between different fuel economy units such as MPG, L/100km, km/L, and MPG (Imperial).

Reviewed August 29, 2026 · Calculation methodology · Inputs stay in your browser

Fuel Economy Value Enter the fuel economy value you want to convert.

From Unit Select the current unit of your fuel economy value.

Fuel Economy Conversion Tips

Higher values of MPG, km/L, and miles/L indicate better fuel efficiency.
Lower values of L/100km and gallons/100 miles indicate better fuel efficiency.
1 US gallon = 3.785 liters, while 1 UK (Imperial) gallon = 4.546 liters.
To convert from L/100km to MPG (US): MPG = 235.215 ÷ L/100km
To convert from MPG (US) to L/100km: L/100km = 235.215 ÷ MPG
US EPA fuel economy ratings use MPG, while most other countries use L/100km.