Fuel Cost Calculator

How to Calculate Fuel Cost

Fuel Cost = (Distance ÷ Fuel Efficiency) × Fuel Price. Example: 500 km trip, 8 L/100km car, fuel at $1.60/L → (500 ÷ 100 × 8) × 1.60 = 40 × 1.60 = $64.

Factors That Affect Fuel Consumption

• Speed: Fuel efficiency peaks around 80–90 km/h and drops at highway speeds.
• Air conditioning: Can increase consumption by 5–25%.
• Tire pressure: Under-inflated tires raise fuel use by 3% per psi drop.
• Load: Extra weight increases consumption proportionally.

Electric Vehicle Equivalent

For EVs, replace L/100km with kWh/100km and fuel price with electricity price per kWh. Compare your EV running costs against petrol using the same formula.

Plan Your Trip Costs

Know your travel distance? Use the Speed Calculator to estimate travel time, then combine with fuel cost to get the full picture of your journey budget.