Fuel Cost per Kilometre
Enter real fuel efficiency and a local petrol price to find fuel cost per km, cost per 100 km, litres used per kilometre, and the fuel expense for any distance.
Cost per km
22.4
Cost per 100 km
2,240
Fuel per km
0.080 L
100 km trip
2,240 · 8 L
Fuel-only estimate. Currency exchange, maintenance, tolls, depreciation, and other ownership costs are not included.
How to Use the Cost per Km Calculator
- Enter real fuel efficiency and select km/L or L/100 km.
- Enter the current petrol price per litre in your currency.
- Optionally enter a journey distance in kilometres.
- Review fuel cost per km, cost per 100 km, fuel per km, and trip cost.
Currency is a label: no exchange-rate conversion occurs. For a representative result, use consumption measured under driving conditions similar to the planned route.
Fuel Cost per Kilometre Formulas
Higher km/L means better efficiency; lower L/100 km means better efficiency. Convert between them with L/100 km = 100 ÷ km/L.
Worked Cost-per-Kilometre Example
Inputs: 12.5 km/L, PKR 280 per litre, 150 km.
Fuel per km = 1 ÷ 12.5 = 0.08 L
Cost per km = 280 ÷ 12.5 = PKR 22.40
Cost per 100 km = 22.40 × 100 = PKR 2,240
Trip cost = 22.40 × 150 = PKR 3,360
The example is illustrative. Replace both mileage and price with current, locally relevant values.
Mileage Units and Useful Conversions
km/L and L/100 km
km/L describes distance travelled on one litre. L/100 km describes litres consumed across 100 kilometres. A reading of 12.5 km/L equals 8 L/100 km.
MPG to km/L
Multiply US MPG by 0.425144 or Imperial MPG by 0.354006. One US gallon is 3.785411784 litres, one Imperial gallon is 4.54609 litres, and one mile is 1.609344 kilometres. Do not treat US and Imperial MPG as identical.
What Changes Fuel Cost per Km?
Fuel price
A price rise changes cost per km even if consumption remains unchanged.
Traffic and route
Idling, stop-start traffic, hills, rough roads, wind, and short journeys can increase consumption.
Vehicle and load
Tyre pressure, maintenance, engine condition, passengers, cargo, roof racks, and towing affect efficiency.
Driving behaviour
High speeds, harsh acceleration, heavy braking, and unnecessary idling can use more fuel.
Limitations and Topical Scope
This fuel cost calculator assumes the entered mileage and petrol price apply across the distance. It does not predict live fuel prices or automatically adjust for route conditions, measurement error, price changes, or fuel quality. Results are estimates, not invoices or reimbursement rates.
This page targets petrol cost per kilometre and per 100 km. For miles, use the planned cost-per-mile tool; for fuel required and passenger sharing on a route, use the trip petrol calculator. For broad vehicle petrol expense, use the general petrol calculator. These boundaries avoid duplicating those calculators' search intent.
FAQ
Cost per Kilometre FAQs
Answers about petrol cost per km, mileage units, conversions, and real-world estimates.
Methodology and Accuracy
The tool converts the selected efficiency to litres per kilometre, multiplies by the entered price, and retains full JavaScript numeric precision until results are displayed. It does not call a fuel-price or currency API.
Read the petrol expense formula guide and calculation methodology. Last reviewed: 3 August 2026.
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