Fuel Economy Converter

Fuel Economy Converter helps convert vehicle efficiency and fuel consumption measurements in one place. It is useful when you need to compare more than one unit, check a value quickly, or prepare a measurement for vehicle comparisons, trip estimates, reviews, and ownership planning.

The default view starts with Miles per gallon (US) (mpg (US)) and converts to Kilometer per liter (km/L). You can change either unit from the dropdowns, which makes the page useful for car comparisons, trip planning, and international vehicle specifications.

Calculate fuel efficiency conversions between miles per gallon (US/UK), kilometers per liter, and liters per 100 kilometers. This page is built for situations where the first unit you try may not be the final unit you need, so the calculator keeps the full supported list close to the input fields.

Convert mpg, km/L, and L/100 km with reciprocal formulas handled. That makes it useful for car comparisons, trip planning, and international vehicle specifications, especially when a measurement needs to be reviewed, copied, or compared in a different unit system.

In its default state, the page applies the Miles per gallon (US) to Kilometer per liter formula: value × factor (via km/L base). If you change either dropdown, the displayed result and formula update for the selected pair.

For accurate results, keep extra decimal places while checking the value, then round the final answer only as much as your task requires.

The quick reference below uses the default mpg (US) to km/L direction so you can compare common values before entering your own number.

This page is also useful when you are not yet sure which fuel economy pair you need. Try the value with different units, compare the results, and keep the unit label beside the final number so it remains clear when shared.