Energy divided by power
Energy added = usable capacity × (target SOC − starting SOC).
Time ≈ energy / (charger power × efficiency). Real charging is not linear across the whole pack.
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EV Charging Time Calculator
Estimate charging time from battery capacity, state of charge and charger power.
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Estimate the energy to add and the time at a constant charging power.
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Assumptions and limits.
- Constant charging power and a simplified efficiency. Real charging tapers and is limited by the vehicle, charger, cable and battery temperature.
Frequently asked questions
Why is the real charging time longer?
Charging tapers near full, and the vehicle, charger, cable and temperature can all limit power.