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EV Charging Time Cost Calculator

Estimate EV charging time and cost from battery size, charger power and your electricity rate.

EV charging

Enter the charge session details. Results update live.

Charging time
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Enter the session details to estimate.

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How charging time is estimated

Energy added is battery size times the percentage range, and dividing by charger power in kilowatts gives hours. A 60 kWh battery charging from 20 to 80 percent needs 36 kWh, which takes about 4 hours 52 minutes on a 7.4 kW home wallbox.

Why real charging slows near full

Batteries accept full power only up to about 80 percent, then the car tapers power to protect the cells. A DC fast charger might add 20 to 80 percent in 30 minutes but need another 30 minutes for the last 20 percent.

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EV Charging Calc FAQs

How long does it take to charge an EV at home?
On a 7.4 kW wallbox, a typical 60 kWh EV charging 20 to 80 percent takes just under 5 hours, easily done overnight. A standard outlet at 2.3 kW needs three times longer.
How much does it cost to charge an EV?
Multiply the kWh added by your electricity rate. Adding 36 kWh at 0.15 per kWh costs 5.40, far less than the equivalent petrol for most cars.
Is it bad to charge to 100 percent?
Regularly charging to 100 percent and leaving it there stresses lithium batteries. Most manufacturers recommend a daily limit of 80 percent and 100 percent only before long trips.
What is the difference between kW and kWh?
kW is power, how fast energy flows. kWh is energy, how much is stored. A 50 kW charger running for one hour delivers 50 kWh.
Why is public fast charging more expensive?
Operators pay demand charges and equipment costs, so DC fast charging often costs 3 to 5 times home rates. Home overnight charging is almost always the cheapest option.
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