EV charging cost calculator
Calculate how much it costs to charge an EV at home and the cost per kilometer driven.
Losses cover the energy dissipated between the outlet and the battery. Public DC fast chargers usually cost 2–4× the home rate per kWh.
How the calculation works
The charge cost is battery (kWh) × rate × (1 + losses). Divided by the range, you get cost per km. E.g., a 50 kWh battery at $0.80/kWh with 10% losses = $44.00 per full charge; with 300 km of range, ~$0.15/km — typically 3–5× cheaper than gasoline.
Examples
- 50 kWh battery, R$0.80/kWh, 10% losses: R$44 per full charge; ~R$0.15/km with 300 km.
- Versus gasoline at R$0.55/km, the EV is ~3.7× cheaper per km.
Frequently asked questions
How do I compare with a gas car?
Compare cost per km: for the EV it's this result; for gas, fuel price ÷ km per liter (see our fuel cost calculator).
Does charging 20%→80% change the cost?
Cost is proportional: 60% of the battery costs 60% of a full charge. The 20–80% window is for battery health, not price.
Charge at home or at a station?
Home is usually much cheaper (residential rate). Fast public stations charge more for convenience and speed.
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Updated on July 5, 2026 · by Rafael Rossi · Methodology & sources