Fuel Cost Calculator
What a trip costs in fuel — and whether petrol, CNG or an EV is cheaper for the way you drive.
At a glance
- Trip cost: fuel for the distance (one way or return), plus tolls and parking, and how much each person pays.
- Petrol vs diesel vs CNG vs electric: cost per km, per month and per year for the distance you drive, for a car or two-wheeler.
- Adds the vehicle price and upkeep to show the total cost of owning each over 3 to 10 years.
- Tells you after how many km a dearer CNG, diesel or electric vehicle pays for itself against petrol.
- Finds your real mileage with the full-tank method, and uses it in the other calculators.
- Every price and mileage can be changed — fuel prices differ by city — and your figures are remembered on this device.
Step by step
How to calculate fuel cost
- 1
Enter the distance
One way, and turn on Return trip if you’re coming back.
- 2
Enter mileage and price
Your vehicle’s km per litre (or kg, or kWh) and the fuel price in your city.
- 3
Add tolls and people
Tolls and parking, and how many people share the cost.
- 4
Compare fuels
Switch to Petrol vs CNG vs EV to see running and ownership costs for your monthly driving.
Features
Everything you need, nothing you don’t
Trip cost
Return trips, tolls, split per person.
Four fuels
Petrol, diesel, CNG and electric.
Car or two-wheeler
Typical figures for each.
Cost of owning
Price + fuel + upkeep over the years.
Break-even
When a pricier vehicle pays off.
Real mileage
From two full-tank fill-ups.
The formula
Fuel cost = distance ÷ mileage × fuel price. A 500 km round trip in a car that does 15 km a litre needs 500 ÷ 15 = 33.3 litres; at ₹95 a litre that is about ₹3,167 — ₹6.33 a km. For an EV, use km per kWh and the electricity price: at 6.5 km/kWh and ₹8 a unit, the same trip costs about ₹615.
Petrol, diesel, CNG or electric? (car, 1,000 km a month)
Using example prices of ₹10 lakh (petrol), ₹11.5 lakh (diesel), ₹10.9 lakh (CNG) and ₹14 lakh (electric), with servicing included. Enter the actual prices of the models you’re comparing.
| Fuel | Typical cost a km | Fuel a month | Pays back the extra price after |
|---|---|---|---|
| Petrol (15 km/l at ₹95) | ₹6.33 | ₹6,333 | — |
| Diesel (19 km/l at ₹88) | ₹4.63 | ₹4,632 | about 1 lakh km |
| CNG (25 km/kg at ₹76) | ₹3.04 | ₹3,040 | about 28,000 km |
| Electric (6.5 km/kWh at ₹8) | ₹1.23 | ₹1,231 | about 71,000 km |
FAQ
Frequently asked questions
How do I calculate petrol cost for a trip?
Is an electric car cheaper to run than petrol?
Is CNG worth it?
How do I check my real mileage?
Why is my mileage lower than the company figure?
Does the ownership cost include insurance?
Keep going
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