Fuel economy converters
US MPG and liters per 100 km are reciprocal measures; zero requires special handling. Choose an exact direction below, or open the universal converter for all compatible units.
Example fuel economy conversions
Start with a calculated reference value, then open the tool to enter your own measurement. Results marked ≈ are rounded for display.
- US MPG to L/100 km30 US mpg ≈ 7.840486111 L/100 km
Understanding fuel economy
Fuel efficiency and consumption are reciprocals
US miles per gallon expresses distance per volume; liters per 100 kilometers expresses volume per distance. The relationship is reciprocal, so you cannot convert with one fixed multiplier.
How to verify a conversion
Zero and negative fuel-economy inputs do not yield a finite reciprocal conversion. Imperial MPG is different from US MPG.
Source definitions: NIST Guide to the SI. See our conversion methodology for calculation and rounding details.
Accurate calculations, no guesswork
Every converter uses consistent unit definitions and returns an interactive result you can verify. For multiple measurements, use the batch converter.
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