This Calculator calculates L/100km Fuel Efficiency (liters per 100 km Fuel Consumption) .

Fuel economy
is the amount of fuel required to move a vehicle over a given distance.
Fuel efficiency is the efficiency of converting energy contained
in a carrier fuel to kinetic energy or work. Fuel efficiency
can also mean the output one gets for a unit amount of fuel input
such as "miles per gallon" or "liters per 100
kilometers" for an automobile (sometimes called fuel
economy). Automobile fuel efficiency can be calculated
in either l/100 km or MPG (Litres per 100
km). This Online Fuel Efficiency Calculator can
calculate l/100 km.