EV vs Petrol Total Cost of Ownership Calculator — your prices, your tariff, your verdict

voltmile compares the true cost of owning an electric vehicle versus a petrol one over the years you plan to keep it — using your purchase prices, electricity tariff, fuel price, mileage, maintenance and resale — and circles the exact break-even day. It ships no price data and never fetches any: results are exactly as good as the numbers you enter.

How the calculation works

For each option, total cost of ownership is price + annual_km × years × cost_per_km + years × maintenance − resale. EV running cost is Wh/km × tariff ÷ 1000 paise per km; petrol is fuel_price × 10 ÷ (km/L × 10) paise per km. All money is held as integer paise so nothing drifts by rounding.

A worked example

A scooter: EV ₹1,50,000 vs petrol ₹95,000, 8,000 km/year for 5 years, electricity ₹8/kWh at 35 Wh/km, petrol ₹105/L at 50 km/L, maintenance ₹1,500 vs ₹3,500/year, resale ₹40,000 vs ₹35,000. voltmile computes EV running cost ₹0.28/km vs petrol ₹2.10/km, total cost ₹1,28,700 vs ₹1,61,500 — a lifetime saving of ₹32,800, which is 20.31% of the petrol option's total cost. The EV breaks even on day 1213 (about 30,220 km on a distance-only basis, which excludes the maintenance saving and so differs from the day figure).

What it deliberately leaves out

No live prices, no loan/EMI interest, no fuel or tariff inflation, no battery-degradation curves, no subsidy tables, and no depreciation prediction — resale is an assumption you enter and label as one. This is arithmetic, not purchase advice; a rupee figure cannot weigh range anxiety or charging access.

Try it below

The calculator below is loaded with a sample scooter comparison. Edit any field to make it yours — nothing you type leaves this page.