Free tool
EV vs petrol cost calculator
Enter how far you drive and how you charge — see your running cost per km, per month and per year.
Calculate your savings
You save about
₹80,821 / year
- Petrol cost per km
- ₹7.18
- EV cost per km
- ₹1.57
- Petrol per month
- ₹8,621
- EV per month
- ₹1,886
Energy cost only — excludes maintenance, insurance and purchase price.
Cost per km at a glance
Worked example: 7 km/kWh EV vs a 15 km/L petrol car, Chennai petrol at ₹107.76/L (15 Oct 2026).
| Option | Energy price | Cost per km | Cost per 1,000 km |
|---|---|---|---|
| Petrol car | ₹107.76 / litre | ₹7.18 | ₹7,184 |
| EV — Relux fast charging | ₹18 / kWh | ₹2.57 | ₹2,571 |
| EV — home charging | ₹8 / kWh (assumed) | ₹1.14 | ₹1,143 |
Frequently asked questions
What is the running cost of an electric car per km in India?
Divide the electricity price by the car's efficiency. At 7 km/kWh, fast charging at ₹18/kWh costs about ₹2.57/km and home charging at ₹8/kWh about ₹1.14/km, against about ₹7.18/km for a 15 km/L petrol car at ₹107.76/L.
Is public fast charging more expensive than home charging?
Yes. Public DC charging includes the station's electricity tariff, a service charge for the charger and site, and 18% GST, so it costs more per kWh than a home connection — but it is still cheaper per km than petrol for most cars.
How can I lower my EV running cost?
Charge at home or at work for daily driving, use fast chargers for trips, and avoid charging to 100% on DC. Under time-of-day tariffs, daytime (solar-hour) electricity is usually cheapest.
Charge for less than petrol
Find Relux DC chargers across South India.