How to use the Fuel Economy Converter
Choose a fuel-economy format, enter a value, and convert it. Enter the quantity first, then confirm both the source and destination units before converting.
What this converter does
Convert miles per gallon and liters per 100 kilometers. The converted value represents the same underlying quantity expressed in a different unit or format, so the meaning of the measurement stays consistent while its numeric representation changes.
When this tool is useful
Use the Fuel Economy Converter when a measurement, specification, price, or reference is written in one unit or format but you need the equivalent in another. It is especially helpful when comparing information from sources that use different measurement systems.
How the conversion works
Fuel-economy formats are not all linear equivalents. MPG expresses distance per fuel volume, while L/100 km expresses fuel volume per distance, so converting between them requires a reciprocal relationship.
Practical example
For example, convert a vehicle rating from US MPG to L/100 km when comparing specifications published in different markets.
Conversion notes
- US MPG and Imperial MPG are different units; this tool labels the supported MPG standard explicitly.
- Driving conditions, temperature, load, traffic, and vehicle condition affect real-world fuel economy.
- A converted rating preserves the published measurement; it does not predict your actual consumption.