Calculates fuel efficiency as distance ÷ fuel used, the kilometres driven per litre (km/L). The fuel needed for 100 km is also shown.
Fuel efficiency says how far a car travels on one litre of fuel. Divide the distance driven by the fuel it took.
is the efficiency in km/L, the distance in kilometres and the fuel in litres. The fuel needed to cover 100 km is , shown alongside it.
Driving 450 km on 30 L gives km/L. Covering 100 km then takes L or so.
To measure this properly, fill the tank to the brim, reset the trip meter, drive, then fill to the brim again. What goes in the second time is exactly what the trip consumed.
The two answers run in opposite directions. A high km/L is good; a high L per 100 km is bad. Europe quotes fuel use the second way, so a car advertised there as "6.7" is the same car Japan would call 15 km/L.
Divide the price of a litre of fuel by the efficiency to get the fuel cost of one kilometre. At 170 a litre and 15 km/L, each kilometre costs about 11.3.
A fuel figure of zero or less cannot be divided by, so the calculator asks for a positive amount.