Fuel comparison
Diesel vs CNG Cost Calculator
Compare running costs for Diesel and CNG vehicles in India, including cost per km, monthly expenses, yearly savings and winner recommendation.
Example values
Diesel: ₹90 / L, 18 km/L
CNG: ₹78 / kg, 28 km/kg
Monthly Running: 1500 km
Compare Diesel and CNG
Enter your local diesel pump price.
Choose Daily or Monthly usage mode above.
Summary
Diesel Cost / KM
₹0.00
CNG Cost / KM
₹0.00
Monthly Diesel Cost
₹0.00
Monthly CNG Cost
₹0.00
Monthly Savings
₹0.00
Yearly Savings
₹0.00
Savings Percentage
0%
Winner
Waiting for inputs
This calculator uses tonight's prices and your mileage values to determine whether Diesel or CNG is the better option. It calculates cost per kilometre, monthly fuel spend, yearly savings and a simple winner badge to highlight the cheaper fuel.
Break-even Comparison
The longer the green bar, the more advantageous CNG becomes relative to diesel.
Frequently Asked Questions
CNG is often cheaper per kilometre because it typically costs less and CNG vehicles are generally more efficient. The calculator compares your local prices and mileage to determine the cheaper option.
Monthly savings depend on your mileage, daily or monthly running distance, fuel prices, and vehicle efficiency. The tool calculates the exact saving based on your inputs.
CNG is usually a strong choice for daily commutes because it offers lower per-km cost and stable fuel prices in many Indian cities.
Yes. Higher mileage reduces cost per kilometre. Diesel and CNG running costs are both calculated by dividing fuel price by mileage.
Diesel often performs better for long highway travel due to range and tank capacity, while CNG is usually more economical for city or regular commuting routes.
Yes. Enter your local diesel price in ₹/L and CNG price in ₹/kg, along with mileage data, to compare running costs side by side.
Typically yes, but the calculator checks your exact numbers to confirm whether CNG or diesel is cheaper for your driving pattern.
This calculator is accurate for running cost comparison. It uses standard formulas and your own input values, but it does not include maintenance or purchase costs.
Yes. Fleet managers and business users can use it to compare diesel and CNG costs for their vehicles and plan monthly budgets.
Absolutely. If diesel or CNG prices change, you can update the values and the calculator will instantly recompute savings.
Cost per km is calculated by dividing the fuel price by your vehicle mileage: Diesel price / Diesel mileage and CNG price / CNG mileage.
Yes. DieselPrice.in provides this running cost calculator completely free for personal and business users.
How this calculator works
This Diesel vs CNG calculator uses your local fuel prices and vehicle fuel economy to compute running costs. It is built specifically for Indian commuting and monthly budget comparison.
If you enter daily running kilometres, the tool multiplies by 30 to estimate monthly usage. If you choose monthly running, the value is used directly.
The calculator also ensures that prices and mileage are non-zero and positive, so the output remains stable and easy to trust.