Cost per km equals total fuel spent plus other car costs (maintenance, repairs, insurance), divided by distance driven over the same period.
Frequently asked questions
- What should I include in "other costs"?
- Anything beyond fuel: scheduled maintenance, repairs, tires, insurance, parking or tolls for the same period — the more complete, the more realistic your cost per km.
- Why is fuel-only cost per km shown separately?
- Fuel-only cost is what most people compare between cars, but it hides the real total — a cheaper-to-fuel car with expensive maintenance can cost more per km overall.