Calculate trip cost and price per kilometer from distance, fuel efficiency and fuel price, with passenger splits and vehicle comparisons.
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Price Per Kilometer Formula
The calculator uses different formulas depending on the tab you choose.
Cost ÷ Distance
PPK = TC / D_km
CPP = TC / P
PPPK = PPK / P
Fuel Trip Cost
Fuel_L = D_km * FE_L100 / 100
TC = Fuel_L * FP_L + EC
PPK = TC / D_km
Compare Vehicles
Mixed_FE = City_FE * City_Share + Highway_FE * Highway_Share
Fuel_L = D_km * Mixed_FE / 100
PPK = (Fuel_L * FP_L) / D_km
- PPK = price per kilometer
- TC = total trip cost
- D_km = distance in kilometers
- P = number of passengers
- CPP = cost per passenger
- PPPK = price per passenger-kilometer
- Fuel_L = fuel used in liters
- FE_L100 = fuel efficiency in liters per 100 kilometers
- FP_L = fuel price per liter
- EC = extra costs, such as tolls, parking, or fees
- City_FE = city fuel efficiency in L/100 km
- Highway_FE = highway fuel efficiency in L/100 km
- City_Share = city driving percentage written as a decimal
- Highway_Share = highway driving percentage written as a decimal
In the Cost ÷ Distance mode, you enter a total cost and distance. The result is the cost for each kilometer. If you enter passengers, the calculator also shows how the cost splits between people.
In the Fuel Trip Cost mode, the calculator estimates fuel used from distance and fuel efficiency. It then multiplies fuel used by fuel price and adds any extra costs.
In the Compare Vehicles mode, the calculator blends city and highway fuel efficiency using your city driving percentage. It then ranks the vehicles by trip cost and cost per kilometer.
Typical Fuel Efficiency and Cost Inputs
Use these ranges to check whether your inputs look reasonable.
| Vehicle type | Typical L/100 km | Typical km/L | Cost effect |
|---|---|---|---|
| Small hybrid | 3.5 to 5.0 | 20.0 to 28.6 | Low fuel cost per km |
| Compact petrol car | 5.5 to 7.5 | 13.3 to 18.2 | Moderate fuel cost per km |
| SUV or crossover | 7.5 to 11.0 | 9.1 to 13.3 | Higher fuel cost per km |
| Pickup or large van | 10.0 to 16.0 | 6.3 to 10.0 | High fuel cost per km |
| Input type | What to enter | Notes |
|---|---|---|
| Fuel price | Price per liter, US gallon, or imperial gallon | The calculator converts it to price per liter for fuel cost calculations. |
| Distance | Kilometers or miles | Miles are converted to kilometers before the price per km is calculated. |
| Extra costs | Tolls, parking, ferry fees, road fees | These raise the total trip cost and price per kilometer. |
| Passengers | Number of people sharing the trip cost | Passenger count changes the split cost, not the total vehicle cost. |
Price Per Kilometer Examples
Example 1: Total cost divided by distance
You spend $90 on a 300 km trip.
PPK = 90 / 300 = 0.30
The price per kilometer is $0.30/km.
Example 2: Fuel trip cost
You drive 450 km. Your car uses 7.5 L/100 km. Fuel costs $1.60 per liter. You also pay $12 in tolls.
Fuel_L = 450 * 7.5 / 100 = 33.75
TC = 33.75 * 1.60 + 12 = 66.00
PPK = 66.00 / 450 = 0.1467
The total trip cost is $66.00. The price per kilometer is about $0.15/km.
Price Per Kilometer FAQ
What is a good price per kilometer?
It depends on the vehicle, fuel price, route, and whether you include tolls or parking. A small efficient car may have a fuel-only cost below $0.15/km in some places. A larger vehicle or a trip with tolls can be much higher. For true operating cost, include maintenance, tires, insurance, depreciation, and other ownership costs.
Should I include tolls and parking in price per kilometer?
Include them if you want the real trip cost. Fuel-only price per kilometer is useful for comparing vehicle fuel use. Total trip price per kilometer is better when you want to split costs or estimate the full cost of a journey.
Why does the calculator convert miles to kilometers?
The main result is price per kilometer, so all distances must use kilometers in the formula. If you enter miles, the calculator converts miles to kilometers using 1 mile = 1.609344 kilometers. It can also show price per mile for comparison.
