EV charging time calculator
Enter your battery capacity, the charge level you start and finish at, and the power of your socket, portable charger or wallbox. The calculator respects your car's onboard charger limit and shows how many kilometres each hour of charging adds.
Your car's onboard charger is the limit here, not the charger. A more powerful charger would not charge faster.
Typical charging times from 20 to 80%
Assumes the car accepts the full power and 90% charging efficiency. Round figures; real sessions vary with temperature and battery state.
| Battery | 2.3 kW · household socket, 10 A | 3.7 kW · 16 A single-phase | 7.4 kW · 32 A single-phase | 11 kW · 16 A three-phase | 22 kW · 32 A three-phase |
|---|---|---|---|---|---|
| 40 kWh | 11 h 35 min | 7 h 10 min | 3 h 35 min | 2 h 25 min | 1 h 15 min |
| 60 kWh | 17 h 25 min | 10 h 50 min | 5 h 25 min | 3 h 40 min | 1 h 50 min |
| 80 kWh | 23 h 10 min | 14 h 25 min | 7 h 10 min | 4 h 50 min | 2 h 25 min |
How this is calculated
Energy to add = battery capacity × (target % − start %) ÷ 100. Charging a 60 kWh battery from 20 to 80% means 36 kWh has to reach the battery.
Effective power = the smaller of the charger's power and your car's maximum AC charging power. An 11 kW car on a 22 kW wallbox charges at 11 kW.
Charging time = energy to add ÷ (effective power × efficiency). With 90% efficiency, 36 kWh at 11 kW takes 36 ÷ (11 × 0.9) ≈ 3.6 hours.
Range added per hour = effective power × efficiency ÷ consumption × 100. At 11 kW and 18 kWh per 100 km that is about 55 km for every hour of charging.
Assumptions and limits
- AC charging only (home, work and most public AC posts). DC fast charging follows a charging curve that this calculator does not model.
- Nominal European powers at 230 V per phase: 10 A = 2.3 kW, 16 A = 3.7 kW and 32 A = 7.4 kW single-phase; 16 A = 11 kW and 32 A = 22 kW three-phase.
- Charging power can fall as the battery approaches full, so the calculator may underestimate a high state-of-charge session. The exact curve is vehicle-specific.
- Battery temperature can change charging power and energy use. Follow the vehicle instructions for preconditioning and charging in hot or cold conditions.
Frequently asked questions
How long does it take to charge an EV at home?
At 11 kW a typical 60 kWh battery goes from 20 to 80% in about 3 h 40 min. From a household socket at 2.3 kW the same charge takes about 17 hours, which is why socket charging suits low daily mileage.
Why does my car charge slower than the wallbox's power?
Your car's onboard charger caps AC charging. Its limit and phase support are vehicle-specific, so check the specification or manual. A wallbox cannot make the car accept more AC power than that limit.
Is it bad to charge to 100%?
The recommended everyday limit depends on the vehicle, battery, software and how the car is used. Follow the charging guidance in your vehicle manual; do not assume one rule applies to every battery chemistry.
Does charging efficiency matter?
Yes. Some wall energy is used by charging electronics, battery conditioning and other systems, and the share varies by vehicle and conditions. At the calculator's 90% example, adding 36 kWh to the battery requires about 40 kWh from the wall.
