Fuel Cost Calculator

For a typical commuter driving 40 km/day at 15 km/litre with petrol at ₹103/litre over 26 working days, the monthly fuel cost is approximately ₹7,125. Diesel users pay around ₹4,680/month and CNG users around ₹2,836/month for the same commute. Costs vary by city — metro petrol prices are 5–8% higher than smaller towns.

Fuel cost per km = Fuel price (₹/litre) ÷ Vehicle mileage (km/litre). For petrol at ₹103/litre and 15 km/litre, cost per km = ₹6.87. For diesel at ₹90/litre and 20 km/litre, it is ₹4.50/km. For CNG at ₹76/kg and 22 km/kg, it is ₹3.45/km. Use the calculator above with your actual fuel price and mileage for a precise figure.

Yes, significantly. CNG at ₹3.45/km is about half the cost of petrol at ₹6.87/km. For 40 km/day over 26 days, CNG users save roughly ₹4,289/month versus petrol. However, CNG vehicles cost ₹50,000–₹1,50,000 more upfront and refuelling stations are concentrated in major cities like Delhi, Mumbai, Ahmedabad, and Pune. The break-even on the price premium is typically 18–30 months for high-mileage commuters.

Annual fuel spend = (Daily km ÷ Mileage) × Fuel price × Days per month × 12. A typical Indian commuter driving 40 km/day on petrol spends approximately ₹85,000–₹90,000 per year on fuel. Use the calculator above with your actual daily km, mileage, and current fuel price for your city to get a precise estimate. The PDF report breaks down costs month-by-month for budgeting.

A sound rule of thumb is keeping fuel below 10% of monthly income. Spending 10–15% is manageable. If fuel exceeds 15% of your income, it is straining your budget and warrants action — such as carpooling, switching to CNG, reducing trip frequency, or using public transport for part of the commute. Enter your monthly income in the calculator above to see your personal fuel-as-%-of-income signal.