This cost per km calculator works out how much each kilometre you drive actually costs, combining fuel with the other annual expenses of owning the car.
Fuel is only part of the cost
A car’s true cost per kilometre is fuel plus everything else you spend on it each year — insurance, maintenance, inspections, taxes — divided across the kilometres you actually drive. Driving fewer kilometres spreads those fixed costs over less distance, pushing the cost per km up.
Use it to compare or negotiate
This figure is useful to compare cars, decide between driving your own car or an alternative for a trip, or set a fair per-kilometre rate when someone else needs to reimburse your mileage.