Fuel Efficiency Calculator
Turn a distance driven and fuel used into efficiency figures in both km per litre and litres per 100 km.
Quick answer: enter your details below and click Calculate — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
F
Calculators
Enter your details below.
How to use
- Enter the distance you drove in kilometres.
- Enter the fuel used in litres.
- Press Calculate to see your efficiency in km per litre and litres per 100 km.
About this tool
Divide the distance you drove by the fuel you used to get kilometres per litre, then flip that figure to get litres per 100 km. Both numbers describe the same efficiency, just in the two conventions different countries prefer, so you can compare vehicles or track changes over time.
Frequently asked questions
Which figure is better, higher or lower?
For km per litre, higher is better because you go further on each litre. For litres per 100 km, lower is better because you use less fuel for the same distance.
Should I use a full tank or a single fill-up?
Either works as long as the distance and the fuel match the same period. A full-tank-to-full-tank measurement is usually the most accurate.