Unit conversion
Standalone tool pageFuel Economy Converter
Convert fuel economy between US MPG, km/L, and L/100 km.
Output
Result
US MPG
km/L
L/100 km
How It Works
The converter normalizes values through liters per 100 kilometers, then converts to US MPG and kilometers per liter.
Example
30 US MPG is about 7.84 L/100 km and 12.75 km/L.
Frequently Asked Questions
Why does L/100 km go down when MPG goes up?
MPG and km/L measure distance per fuel, where higher is better. L/100 km measures fuel used per distance, where lower is better.
Is this US MPG or UK MPG?
This converter uses US gallons for MPG. UK imperial MPG is different and can be added later as a separate option.
How precise are the conversions?
Conversions use standard factors and rounded display values. Keep more decimal places if you need engineering or scientific precision.
Are local unit differences included?
Only the units labeled in the tool are included. Some regions use different definitions for cups, gallons, tons, or other units.