Fuel Cost per Kilometer & Commute Expense Calculator
Calculate vehicle fuel costs per km, per 100km, weekly commute expenses, and passenger splits.
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, $2.15/L for Diesel)
Calculation Results
Visual Growth Breakdown
Formula & How Fuel Cost per Kilometer & Commute Expense Calculator Works
Fuel cost per kilometer is determined by the vehicle's fuel efficiency rating and pump price. Dividing L/100km by 100 yields the fuel consumed per kilometer, multiplied by the fuel price per litre to determine the running cost per kilometer.
- Enter Fuel Consumption Rate (L/100km) (L/100km): Input your target parameter value.
- Enter Fuel Price per Litre ($/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.
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:
Consumer guidance on mortgage borrowing capacity, compound interest formulas, and loan fees.
Official cash rate target announcements, monetary policy statements, and national economic statistical data.
Residential mortgage serviceability buffer framework (3.0% stress test hurdle rate).
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