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Enter each car's costs and the kilometres it drove in the same period, and we work out the cost per km of every car, the fleet average and which car costs the most.
Km in the period: end odometer minus start odometerInsurance and renewals share: spread the yearly amount: yearly ÷ 12 × monthsOther costs: parking, wash, fees, finesInstalment or depreciation (optional): rough depreciation = (purchase price − expected resale) ÷ months of use
Fleet average cost per kmestimate
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Monthly total
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Most expensive car
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Cheapest car
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Cars counted
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Cost per km by car–
Dotted line = fleet average. Orange = above average.
An estimate from the numbers you entered. Nothing is saved; it runs on your device.
Enter a valid number
The idea is simple: everything you spent on a car in a period, divided by the kilometres it drove in that same period. Keep the period the same for costs and the odometer, and spread yearly amounts like insurance across the months instead of counting them all in the month you paid.
The fleet average is total over total, because a car that drove only 300 km can show a high figure that doesn't represent the fleet.
Sample numbers, not real prices
| Car | km | Fuel | Service | Fixed | Other | Total | Per km |
|---|---|---|---|---|---|---|---|
| Pickup 1 | 4,000 | 900 | 150 | 200 | 50 | 1,300 | 0.33 |
| Pickup 2 | 3,000 | 950 | 400 | 200 | 50 | 1,600 | 0.53 |
| Sedan | 2,500 | 450 | 100 | 150 | 100 | 800 | 0.32 |
Average = 3,700 ÷ 9,500 = SAR 0.39 per km. Pickup 2 is about 37% above average: more fuel and service for fewer kilometres. That's the car to check first.
Sample numbers, not real prices
| Car | km | Fuel | Service | Fixed | Other | Total | Per km |
|---|---|---|---|---|---|---|---|
| Car 1 (petrol) | 5,000 | 4,500 | 800 | 600 | 300 | 6,200 | 1.24 |
| Car 2 (CNG) | 5,500 | 2,600 | 900 | 600 | 300 | 4,400 | 0.80 |
Average = 10,600 ÷ 10,500 ≈ EGP 1.01 per km. In this example the CNG car is about a third cheaper per km. Check the conversion payback in the CNG calculator.
Higher fuel use than its own average: low tyre pressure, a clogged air filter or driving style.
Few kilometres with fixed costs: insurance and renewals spread over less distance.
Repeat repairs: an old car can cost more in service than it saves.
Short trips and traffic: stop-go raises fuel use and brake wear.
Unlogged costs: lost receipts hide the real cost of another car.
FAQ
Add up all the car's costs in a period (fuel, service, insurance share, other costs) and divide by the kilometres it drove in that same period.
For the full running cost, yes. To compare the cars themselves, leave it out: it doesn't depend on the car's condition.
Divide it by 12 and multiply by the months in the period. A yearly 1,200 for one month = 100.
It depends on the country, fuel price, car type and age. What matters most is comparing each car with itself month to month, and with your fleet average.
No. The calculator runs on your device and sends nothing to a server. A copied link carries the numbers in its ending only.
Yes, for anyone with one car or more. For net earnings after fuel, see the ride-hailing drivers page. For ride-hailing drivers
