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EV Charging Cost Per KM

Real running cost per km for an EV at your electricity tariff and efficiency. Compare head-to-head with petrol. India defaults — ₹8/kWh electricity, ₹102/L petrol (Delhi, October 2026), 0.72 kg CO₂/kWh grid factor.

Inputs

Petrol comparison

Result

EV cost per km
₹1.23/km
Petrol cost per km
₹5.67/km
Savings per km
₹4.43/km
Annual EV running cost
₹18.5k
Annual petrol cost (same km)
₹85.0k
Annual savings by driving EV
₹66.5k
CO₂ saved: 262 kg/yr (India grid emission 0.72 kg/kWh; petrol 2.31 kg/L)

How this works

EV cost per km = (Efficiency kWh/100km × (1 + charging loss)) × Tariff ÷ 100
Petrol cost per km = Petrol price ÷ Mileage (km/L)
Annual savings = (Petrol ₹/km − EV ₹/km) × Annual km

The calculator uses measured efficiency (kWh/100 km) rather than nominal range, and applies a charging-loss overhead so the numbers reflect actual grid energy consumed. Petrol mileage should be your real-world number, not the ARAI sticker. If your DISCOM offers a time-of-use tariff, fleets can cut running cost further by scheduling charging overnight — see how smart chargers save the grid for the TOU and V1G mechanics behind this.

Frequently asked questions

At typical home electricity tariff (₹7–9/kWh) and EV efficiency (12–14 kWh/100 km), the running cost is around ₹1–1.5/km. Compare to petrol at about ₹102/L (Delhi, October 2026) and 18 km/L mileage, which works out to roughly ₹5.7/km. EVs are 4–6× cheaper per km on running cost — though this ignores capex difference, which is typically higher for EVs.
Yes. Home/office AC charging typically runs at residential or commercial tariff (₹6–10/kWh). Public DC fast chargers operated by CPOs often charge ₹18–24/kWh — 2–3× the home rate. For maximum EV economic benefit, charge at home/office and use DC fast chargers only for top-ups on trips.
Compact car: 12–14 kWh/100 km. Mid-size sedan: 14–17 kWh/100 km. SUV: 17–22 kWh/100 km. Electric two-wheeler: 3–6 kWh/100 km. These improve with modern powertrains and regen braking; highway driving consumes 15–25% more than city driving.
Yes. AC charging typically has charging losses of 10–15% between the meter and the battery (in the onboard charger, cabling, and battery heating). DC fast charging loss is typically 5–10%. The calculator defaults to 10% which represents a realistic AC-charging average.
Using India's grid emission factor of 0.72 kg CO₂/kWh and petrol's 2.31 kg CO₂/L: an EV consuming 14 kWh/100 km emits ~10 kg CO₂/100 km, vs ~13 kg CO₂/100 km for a petrol car at 18 km/L. India reached 50% non-fossil installed power capacity in 2025, five years ahead of its 2030 target; most generation is still coal, so the grid factor will fall only gradually — but as it does, the EV advantage widens.
For fleet vehicles running 100+ km/day, EV savings compound fast. As an illustration, at a ₹4–5/km running-cost gap vs petrol, a vehicle running 200 km/day saves ₹800–1,000/day on energy. Put your own tariff, efficiency and daily km into the calculator above for your fleet — and note this ignores the difference in purchase price and maintenance.

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