EV Charging Time Calculator
Estimate EV charging time from battery size and charger power.
Quick answer: enter your details below and click Calculate Charging Time — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter the battery size in kWh.
- Enter current and target charge percentages.
- Enter charger power and click Calculate Charging Time.
About this tool
Charging time depends on how much energy the battery needs and how fast the charger delivers it. This calculator divides the energy gap by charger power, which gives a useful estimate. Real charging slows near full, so the last stretch takes longer than this straight-line figure suggests.
Frequently asked questions
Why does the last 20 percent take longer?
Batteries taper their charge rate near full to protect battery health, so 80 to 100 percent is slower per kWh.
Is charger power the only factor?
No. The car's own maximum charge rate, temperature, and shared chargers also limit the real speed.