Calculate your vehicle's fuel cost per kilometre, monthly fuel expense, and compare petrol vs CNG vs electric running costs.
Formula: Cost per km = Fuel price ÷ Mileage. Monthly cost = Cost per km × Monthly km.
Popular car mileage in India: Maruti Swift petrol 22–24 km/L, Hyundai i20 petrol 20–21 km/L, Maruti Baleno petrol 22–23 km/L, Hyundai Creta petrol 16–17 km/L, Maruti Brezza petrol 17–19 km/L, Honda Activa scooter 45–50 km/L. Diesel variants are typically 25–30% more fuel-efficient.
Fuel cost per km = Fuel price per litre ÷ Mileage (km/litre). For example, if petrol costs ₹103/litre and your car gives 15 km/litre: Cost per km = ₹103 ÷ 15 = ₹6.87 per km. Multiply by monthly kilometres to get monthly fuel expense.
Yes, CNG is significantly cheaper than petrol. At current prices (CNG ~₹75/kg, petrol ~₹103/litre), a CNG car giving 25 km/kg costs ₹3 per km while a petrol car giving 15 km/L costs ₹6.87 per km — CNG is about 56% cheaper per km. However, CNG conversion costs ₹15,000–25,000 and reduces boot space.
Yes, electric vehicles have very low running costs. At ₹8/unit and 6 km/kWh, an EV costs just ₹1.33 per km compared to ₹6.87 for petrol. Monthly savings on 1,500 km can be ₹8,300+. However, EVs have higher purchase prices and charging infrastructure is still expanding in India.
To improve car mileage: maintain correct tyre pressure (saves 3–5%), use recommended engine oil grade, keep air filter clean, avoid aggressive acceleration and braking, use AC judiciously (AC reduces mileage by 15–20%), service engine regularly, remove unnecessary weight from car, and maintain steady highway speeds of 60–80 km/h.