The Fuel Economy Converter switches between every common way of measuring fuel efficiency. Because some units are reciprocal (more MPG means fewer liters per 100 km), it applies the correct formulas so conversions are always accurate.
MPG, L/100km and km/L
Fuel economy is measured as either distance per fuel (MPG, km/L) or fuel per distance (L/100km). These have an inverse relationship, so you cannot convert by simple multiplication. This tool handles the reciprocal math for you.
It supports US MPG, UK (imperial) MPG, liters per 100 km, kilometers per liter and miles per liter — covering car specs from any country.
Common fuel economy conversions
- US MPG to L/100km and back
- US MPG to UK MPG (they differ by gallon size)
- km/L to L/100km for metric specs
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