Formulas & Real-Time Calculations
Our calculator uses straightforward, transparent formulas used by automotive engineers and financial planners alike:
Petrol / Diesel
Daily Cost = (Distance ÷ Mileage) × Fuel Price
Example: 40 km ÷ 15 km/L × ₹104.94 = ₹279.84/day.
Monthly: ₹8,395. Yearly: ₹1,02,141.
CNG
Daily Cost = (Distance ÷ km/kg) × CNG Price/kg
Example: 40 km ÷ 22 km/kg × ₹73.59 = ₹133.80/day.
Monthly: ₹4,014. Yearly: ₹48,837.
Electric Vehicle
Energy/day = (Distance ÷ Range) × Battery kWh
Cost = Energy × ₹/kWh
Example: (30 ÷ 200) × 30 kWh × ₹10 = ₹45.00/day.
Monthly: ₹1,350. Yearly: ₹16,425.
How to Use the Fuel Cost Calculator
Our Fuel Cost Calculator makes it easy to estimate your vehicle running expenses in just a few simple steps. Whether you drive a petrol, diesel, CNG, or electric vehicle (EV), you can quickly calculate your daily, monthly, and yearly fuel costs based on current fuel prices and your driving habits.
Step 1: Enter the Distance You Travel
Start by entering the distance you drive, either as a one-way trip, daily commute, or total journey distance. Accurate distance data helps generate precise fuel cost estimates.
Step 2: Select Your Fuel Type
Choose the fuel type used by your vehicle:
- Petrol
- Diesel
- CNG
- Electric Vehicle (EV)
The calculator automatically applies the latest fuel prices or electricity rates for your selected option.
Step 3: Choose Your City
Select your city from the available list. Fuel prices vary across India, and choosing the correct city ensures accurate calculations based on local petrol, diesel, CNG, or electricity rates.
Step 4: Enter Vehicle Efficiency
Provide your vehicle's mileage or efficiency:
- Petrol/Diesel/CNG vehicles: Enter mileage in km/litre or km/kg.
- EVs: Enter battery range or energy consumption details.
Step 5: Review Your Fuel Cost Breakdown
The calculator instantly displays:
- Fuel cost per kilometre
- Cost for the entered trip distance
- Daily fuel expense
- Monthly fuel expenditure
- Annual running cost
Additional Steps for Electric Vehicles (EVs)
Provide your EV's battery capacity and average range per full charge.
This helps estimate charging expenses and running costs more accurately.
Enter Electricity Tariff
Input your electricity cost per unit (kWh) based on your residential or commercial electricity bill.
Compare EV vs Petrol, Diesel, and CNG Costs
Use the results to compare EV charging costs with traditional fuel expenses and identify the most economical transportation option for your needs.
By following these simple steps, you can accurately calculate fuel expenses, compare vehicle running costs, and plan your transportation budget more effectively.
Petrol vs Diesel vs CNG vs EV: Which is Cheaper to Run in India?
With rising fuel prices and increasing adoption of electric vehicles, many Indian car buyers wonder whether petrol, diesel, CNG, or EVs offer the lowest running costs. While the answer depends on fuel prices, driving patterns, and vehicle efficiency, EVs and CNG vehicles generally provide the most economical cost per kilometre, while petrol vehicles remain the most expensive to run for regular commuters.
Petrol vs Diesel Running Cost
Diesel vehicles typically offer better fuel efficiency than petrol cars, making them more economical for high-mileage drivers. However, higher vehicle prices and maintenance costs often offset some of the fuel savings. For drivers covering more than 20,000 km annually, diesel vehicles may still provide long-term cost advantages.
CNG vs Petrol: Which Saves More Money?
CNG vehicles are among the most cost-effective options for urban commuters. Compared with petrol cars, CNG vehicles can reduce fuel expenses by nearly 40% to 50%, making them an attractive choice for daily city driving and commercial usage.
EV vs Petrol Cost in India
Electric vehicles currently offer the lowest running cost among all vehicle categories. Depending on local electricity rates, charging an EV can cost up to 70% less than refuelling a comparable petrol vehicle. EVs also benefit from lower maintenance requirements, further reducing ownership costs.
Which Fuel Type Should You Choose?
- Choose Petrol if you drive occasionally and prefer lower upfront vehicle costs.
- Choose Diesel if you frequently travel long distances and require higher torque.
- Choose CNG if your priority is reducing monthly fuel expenses for city driving.
- Choose an EV if you want the lowest running costs, lower maintenance, and environmentally friendly transportation.
For the most accurate comparison, use our Fuel Cost Calculator to compare petrol, diesel, CNG, and EV running costs based on your city, vehicle mileage, distance travelled, and local fuel prices.
Factors That Affect Your Vehicle's Fuel Efficiency
Fuel efficiency plays a crucial role in determining your overall vehicle running costs. Even small changes in driving habits and vehicle maintenance can significantly improve mileage and reduce fuel expenses. Whether you drive a petrol, diesel, CNG, or electric vehicle, understanding the factors that impact fuel consumption can help you save money and maximize efficiency.
1. Tyre Pressure
Incorrect tyre pressure is one of the most common reasons for poor fuel efficiency. Underinflated tyres create higher rolling resistance, forcing the engine to work harder.
Tips to improve fuel efficiency:
- Check tyre pressure at least once every two weeks.
- Follow the manufacturer's recommended PSI levels.
- Inspect tyres for uneven wear and damage.
- Rotate tyres regularly to maintain balanced performance.
2. Air Conditioner (AC) Usage
Using the air conditioner continuously increases engine load and fuel consumption, especially in city traffic and hot Indian summers.
Tips to improve fuel efficiency:
- Use the AC at moderate temperature settings.
- Park in shaded areas to reduce cabin heat buildup.
- Turn off the AC a few minutes before reaching your destination.
- Use vehicle ventilation whenever weather conditions permit.
3. Driving Speed and Driving Style
Aggressive driving habits such as rapid acceleration and hard braking can significantly reduce mileage.
Tips to improve fuel efficiency:
- Maintain a steady speed whenever possible.
- Accelerate gradually instead of sudden bursts.
- Anticipate traffic conditions to avoid unnecessary braking.
- Use cruise control on highways if available.
4. City Driving vs Highway Driving
Vehicles generally deliver better mileage on highways than in congested urban environments. Frequent stops, traffic signals, and idling increase fuel consumption.
Tips to improve fuel efficiency:
- Plan routes to avoid peak-hour congestion.
- Combine multiple errands into a single trip.
- Use navigation apps to identify faster routes.
- Avoid excessive idling during long stops.
5. Vehicle Age and Maintenance
As vehicles age, engine efficiency can decline if maintenance schedules are ignored. Dirty filters, worn spark plugs, and degraded engine oil can negatively impact fuel economy.
Tips to improve fuel efficiency:
- Follow the manufacturer's service schedule.
- Replace air filters and spark plugs on time.
- Use recommended engine oil grades.
- Address engine warning lights immediately.
6. Traffic Conditions in Indian Cities
Heavy traffic in cities such as Bengaluru, Mumbai, Delhi, Chennai, and Hyderabad can dramatically increase fuel consumption due to constant stop-and-go driving.
Tips to improve fuel efficiency:
- Travel during non-peak hours whenever possible.
- Monitor live traffic updates before starting your journey.
- Avoid routes with frequent bottlenecks.
- Switch off the engine during extended waiting periods.
7. Excess Vehicle Weight
Carrying unnecessary weight forces the engine to consume more fuel to maintain performance.
Tips to improve fuel efficiency:
- Remove unused items from the boot.
- Avoid carrying heavy loads unnecessarily.
- Remove roof racks when not in use.
- Travel with only essential luggage.
8. Fuel Quality
Poor-quality fuel can affect engine performance and reduce mileage over time.
Tips to improve fuel efficiency:
- Refuel at trusted fuel stations.
- Use fuel recommended by your vehicle manufacturer.
- Avoid mixing different fuel types.
- Consider premium fuels only if recommended by the manufacturer.
How Much Can You Save?
By maintaining proper tyre pressure, driving smoothly, reducing unnecessary AC usage, and keeping your vehicle well serviced, many drivers can improve fuel efficiency by 10% to 20%. Use our Fuel Cost Calculator to see how better mileage can reduce your daily, monthly, and annual fuel expenses