Fuel Cost Calculator

What is Fuel Cost Calculator?

The Fuel Cost Calculator estimates how much fuel (and money) you will need for a trip based on total distance, your vehicle's mileage (km/L), and the current fuel price per litre.

How to Calculate Fuel Cost

1. Enter the trip distance in kilometres
2. Enter your vehicle's mileage in km/L
3. Enter the current fuel price per litre
4. Click Calculate to see total fuel required and trip cost

How Fuel Cost Calculator is Calculated

Fuel Required = Distance / Mileage (km/L). Total Cost = Fuel Required × Price per Litre. Cost per km = Price per Litre / Mileage.

Worked Example

Trip distance 400 km, car mileage 15 km/L, petrol ₹105/L: Fuel needed = 400/15 = 26.67 litres. Cost = 26.67 × 105 = ₹2,800. Cost per km = ₹7.

Common Use Cases

• Road trip fuel budgeting
• Daily commute cost estimation
• Comparing petrol vs diesel running cost
• Fleet management fuel planning

Common Mistakes to Avoid

• Using official ARAI mileage instead of real-world mileage — actual mileage is typically 15–25% lower than ARAI-certified figures due to traffic, AC usage, and driving style.
• Not accounting for highway vs city mileage — highway mileage can be 30–50% better than city driving for most cars.
• Forgetting return trip fuel — a round trip doubles the distance and fuel cost.
• Not factoring in toll charges — tolls can add 10–15% to the total trip cost on highways.

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Why You Need This Calculator

With petrol at ₹100+ and diesel at ₹90+ in most Indian cities, fuel costs are a major monthly expense. A daily 30 km commute costs ₹3,000-5,000/month depending on vehicle mileage. This calculator helps compare fuel costs across vehicles, plan road trip budgets, and evaluate whether CNG/electric conversion is worthwhile.

Calculator Features

• Trip fuel cost estimation
• Vehicle mileage-based calculation
• Petrol vs diesel vs CNG comparison
• EV vs petrol cost comparison
• Monthly commute budget
• City-wise fuel price updates

The Math Behind It

Fuel needed = Distance / Mileage. Cost = Fuel needed × Price per liter. Cost per km = Price / Mileage.

Calculation Example

Trip 500 km, car mileage 15 km/l, petrol ₹103/l: Fuel = 500/15 = 33.3 liters. Cost = 33.3 × 103 = ₹3,433. Cost/km = ₹6.87.

Quick Reference

Running cost comparison by fuel type (2026 prices)

Pro Tips & Expert Insights

• 💡 Maintain tire pressure — under-inflated tires reduce mileage by 5-10%.
• 💡 AC reduces mileage by 10-20% — use it judiciously in city driving.
• 💡 Highway driving at 60-80 km/h gives the best mileage — 100+ km/h drops it significantly.
• 💡 CNG costs about 40% less than petrol per km — conversion pays for itself in 1-2 years.
• 💡 EV running cost is ₹1-1.5/km vs ₹5-7/km for petrol — massive long-term savings.

Who Benefits From This?

Daily commuters budgeting fuel, road trip planners, fleet managers, and car buyers comparing running costs.