A 60 kWh car from 20% to 80%
36 kWh added, 40 kWh from the grid at 90% efficiency — 6.00 at 0.15 per kWh, about 5 h 24 min on a 7.4 kW charger.
EV Charging Cost Calculator
Estimate what it costs and how long it takes to charge an electric car, including charging losses.
Result
Enter your values and select Calculate to see the result.
Runs in your browser — nothing you enter is sent to a server.
How the EV Charging Cost Calculator works
Enter the battery size, the charge level you start from and aim for, and your electricity price. Charging loses some energy as heat — about 10% on a home charger — so the calculator adds that to the energy drawn from the grid. Add your charger's power for the time, and the car's consumption for the range added and cost per 100 km.
Formulas
Energy
added = capacity × (to% − from%), from grid = added ÷ efficiency
Cost and time
cost = grid energy × price, time ≈ added ÷ (charger kW × efficiency)
Examples
Range
At 16 kWh per 100 km, those 36 kWh add about 225 km, costing about 2.67 per 100 km.
Frequently asked questions
Why charge to 80%?
Charging slows down above about 80%, and many makers recommend it for daily use to look after the battery.
Is fast charging more expensive?
Usually — public rapid chargers often cost several times the home rate.
How does it compare with petrol?
Compare the cost per 100 km here with the Fuel Cost Calculator.
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