How do I calculate fuel cost for a road trip?

Steps: (1) Find your vehicle fuel efficiency in km/L (check the manual or measure by filling up, driving, and refilling). (2) Divide trip distance by fuel efficiency to get litres required. (3) Multiply litres by current fuel price. Example: 400 km trip, 15 km/L efficiency, Rs 105 per litre: fuel needed = 400/15 = 26.67 litres. Fuel cost = 26.67 x 105 = Rs 2,800. Add 10-15% buffer for city driving or highway climbs.

Fuel Cost Calculator

Calculate the exact fuel cost for any trip - or your monthly fuel spend.

📖 What is the Fuel Cost Calculator?

The fuel cost calculator tells you exactly how much you'll spend on fuel for a trip or over a month, based on the distance, your vehicle's fuel efficiency (mileage), and the current fuel price per litre. Whether you're planning a road trip, estimating commute costs, or budgeting monthly travel expenses, this calculator gives you the precise number.

Fuel is one of the largest variable expenses for vehicle owners. With petrol and diesel prices changing frequently and distances varying by lifestyle, having an accurate estimate prevents budget surprises. The calculator covers two modes: Trip Cost (for a specific journey) and Monthly Cost (for regular commutes and daily driving).

In India, fuel efficiency is expressed as km per litre (kmpl) - also called mileage. It varies significantly by vehicle type, driving style, load, and road conditions. Urban driving with frequent stops and idling typically yields 20–30% lower mileage than the manufacturer's claimed highway figure.

Understanding your cost per kilometre also helps you compare different transportation options. If your car costs ₹7/km in fuel while a cab charges ₹12/km, the car wins on fuel cost alone (not accounting for depreciation, insurance, or parking).

📐 Formula

Fuel Required (litres) = Distance (km) ÷ Fuel Efficiency (km/litre)

Fuel Cost = Fuel Required × Price per Litre

Cost per km = Fuel Cost ÷ Distance

Monthly: Distance = Daily km × Days per month

📖 How to Use This Calculator

Select Trip Cost or Monthly Cost mode.

Enter the distance (or daily km + days).

Enter your vehicle's fuel efficiency in km/litre.

Enter the current fuel price per litre.

Click Calculate - total cost, fuel required, and cost per km appear.

💡 Example Calculations

Example 1 - Mumbai to Pune road trip (150 km each way)

Distance = 300 km | Efficiency = 16 kmpl | Price = ₹103/litre

Fuel = 300 ÷ 16 = 18.75 L | Cost = 18.75 × 103 = ₹1,931.25

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Example 2 - Monthly commute, 30 km/day, 22 working days

Total = 30 × 22 = 660 km | Efficiency = 20 kmpl | Price = ₹98/litre

Fuel = 660 ÷ 20 = 33 L | Cost = 33 × 98 = ₹3,234/month

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Frequently Asked Questions

How do I calculate fuel cost for a trip?+

Fuel cost = (Distance ÷ Fuel Efficiency) × Price per litre. Example: 500 km trip, 15 km/litre car, ₹103/litre petrol: Fuel needed = 500 ÷ 15 = 33.3 litres. Cost = 33.3 × 103 = ₹3,430. This calculator does this automatically.

What is good fuel efficiency in India?+

In India, fuel efficiency is expressed in km per litre (kmpl). Good efficiency by vehicle type: Small hatchback: 18–24 kmpl (e.g. Maruti Alto, Swift). Sedan: 15–20 kmpl. SUV: 12–18 kmpl. Diesel cars typically get 2–5 kmpl more than petrol equivalents. Motorbikes: 40–60 kmpl.

What is the current petrol price in India?+

Petrol prices in India vary by city and are revised periodically. As of early 2026, prices are approximately ₹94–103/litre in major cities. Delhi tends to have lower prices (lower VAT) compared to Mumbai. Check your local fuel station or the IOC/BPCL/HPCL apps for today's exact rate.

How much does a 1,000 km road trip cost in fuel?+

For a mid-size car with 15 kmpl efficiency at ₹100/litre: Fuel = 1,000 ÷ 15 = 66.7 litres. Cost = 66.7 × 100 = ₹6,667. If driving an SUV (12 kmpl): 83.3 litres × ₹100 = ₹8,333. Highway efficiency is better, so actual cost may be 10–15% lower.

How is fuel efficiency measured?+

India uses km/litre (kmpl). The US uses miles per gallon (mpg). Europe uses litres per 100 km (L/100km). This calculator uses kmpl. To convert: mpg × 0.4251 = kmpl; L/100km: kmpl = 100 ÷ (L/100km).

How do I accurately measure my vehicle's real fuel efficiency?+

The fill-up method gives the most accurate real-world fuel efficiency: (1) Fill the tank completely. (2) Reset the trip odometer. (3) Drive normally until about half the tank is used. (4) Fill the tank again, noting exactly how many litres you put in. (5) Divide the trip distance by the litres refilled. Example: drove 350 km, refilled 25 litres → 350/25 = 14 km/L. Repeat over 2-3 fill-ups for a reliable average that accounts for your typical driving mix.

How does speed affect fuel efficiency?+

Fuel efficiency is best at moderate speeds (60-80 km/h for most cars) and decreases at high speeds due to aerodynamic drag. Driving at 120 km/h vs 80 km/h can reduce fuel efficiency by 20-30% for a typical petrol car. City driving (frequent acceleration and braking) also reduces efficiency by 25-40% compared to highway driving. Keeping tyres inflated, using air conditioning sparingly at city speeds, and smooth driving can improve real-world fuel efficiency by 10-15%.

What is the difference between manufacturer fuel efficiency and real-world mileage?+

Manufacturer-stated fuel efficiency (ARAI rating in India) is measured under controlled laboratory conditions and typically runs 20-30% higher than what most drivers achieve in real-world conditions. Real-world mileage is reduced by city traffic, air conditioning use, full passenger loads, tyre pressure, and driving style. A car rated at 18 kmpl by ARAI may deliver 13-15 kmpl in actual urban use. Use your own measured fuel efficiency for more accurate trip cost estimates.

How does driving speed affect fuel consumption?+

Fuel efficiency is highest at moderate speeds (60-80 km/h for most cars). Below this, stop-start losses dominate. Above this, aerodynamic drag increases as the cube of speed - driving at 120 km/h can use 20-30% more fuel than at 90 km/h. Maintaining steady speed and avoiding hard acceleration and braking reduces fuel consumption by 15-30%.

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📌 Quick Tips

💡To check your car's actual fuel efficiency, fill the tank completely, reset the trip meter, drive normally until the tank is low, then refill. Divide km driven by litres filled.

💡Highway driving is typically 15–25% more fuel-efficient than city driving because highways avoid frequent stops and acceleration events.

💡Tyre pressure affects fuel consumption - driving with tyres 20% below recommended pressure increases fuel use by up to 3%.