Fuel Cost per Kilometer & Commute Expense Calculator
Calculate vehicle fuel costs per km, per 100km, weekly commute expenses, and passenger splits.
Last reviewed by the myCalculator Editorial Team
Input Parameters
e.g. 5.2 L/100km for Hybrid, 8.5 for Sedan/Hatch, 11.5 for 4WD SUV
Current Australian pump price (e.g. $1.95/L for U91, $2.15/L for Diesel)
Calculation Results
Visual Growth Breakdown
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Formula & How Fuel Cost per Kilometer & Commute Expense Calculator Works
Fuel cost per kilometre is your fuel use in litres per 100 km, divided by 100, then multiplied by the price per litre. A car using 8.5 L/100 km with petrol at $1.95 per litre costs 0.085 × 1.95 = about $0.166 per kilometre, so 16.6 cents. A 100 km trip costs about $16.58 in fuel and 20,000 km a year costs about $3,315. Use the figure to compare vehicles, to set a km rate for reimbursing work travel, or to see how much a change in the pump price affects your yearly running cost. Tolls, servicing, tyres and depreciation are extra.
- Enter Fuel Consumption Rate (L/100km) (L/100km): Input your target parameter value.
- Enter Fuel Price per Litre ($/L) ($/L): Input your target parameter value.
- Enter Trip or Commute Distance (km) (km): Input your target parameter value.
- Enter Annual Distance Driven (km/year) (km/yr): Input your target parameter value.
- Enter Passengers Splitting Fuel Cost: Input your target parameter value.
- Apply Formula: Calculate using
Cost/km = (L/100km ÷ 100) × $/L | Trip Cost = Distance × Cost/km | Annual Cost = Annual km × Cost/km. - Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)
How do you calculate fuel cost per km?
Divide your car's fuel consumption (L/100km) by 100 to get litres per kilometer, then multiply by the cost of fuel per litre. For example, at 8.0 L/100km and $2.00/L, fuel cost is (8.0 ÷ 100) × $2.00 = $0.16/km (16¢ per km).
How much does the average Australian spend on petrol each year?
Based on the Australian average annual mileage of 13,500–15,000 km and a typical consumption of 9.0 L/100km at $2.00/L, the average Australian motorist spends between $2,430 and $2,700 per year on fuel.
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Authoritative Standards & Verified Reference Citations
Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:
Open government data, scientific datums, and public sector mathematical reference datasets.
Australia's national authority on physical, chemical, and biological metric measurement standards.
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