EV Charging Cost Calculator

Work out the cost to charge an electric car from one battery level to another. It counts the energy lost while charging and shows the cost per mile, then compares your home rate with public charging.

Work out what it costs to charge an electric car. Enter the battery size, the charge levels, your electricity rate and the car’s efficiency to see the charging cost and the cost per mile, and compare home charging with public rates.

Charge details

Charging cost

$6.80

20% → 80% at $0.17/kWh

Energy added
36 kWh
Drawn from grid
40 kWh
Cost per mile
5.4¢
Range added
126 mi

Home vs public charging

At home ($0.17/kWh)
$6.80
Public ($0.45/kWh)
$18.00
Saved by charging at home
$11.20

Electricity rates, charging losses and real-world efficiency vary with temperature, charger type and driving. Estimates only.

How it works

  1. 1

    Enter your battery and charge levels

    Add the battery size in kWh and the current and target charge percentages.

  2. 2

    Add your rates and efficiency

    Put in your home electricity rate, the charging efficiency and your car’s miles per kWh.

  3. 3

    See the cost

    See the charging cost and the cost per mile, plus how home charging compares with public rates.

Instant & 100% private — nothing is uploaded

Every calculation runs locally in your browser. The income, balances and goals you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.

Frequently asked questions

How much does it cost to charge an EV at home?
Multiply the energy your battery needs by your electricity rate, then adjust for charging losses. Charging a 60 kWh battery from 20% to 80% needs about 36 kWh, or roughly 40 kWh from the grid once losses are counted. At $0.17 per kWh that's about $6.80.
Why is the energy from the grid more than the energy added to the battery?
Charging isn't perfectly efficient. AC charging loses roughly 10% as heat in the charger and battery, so you pay for more energy than actually reaches the battery. The efficiency figure captures this, and you can lower it for cold weather or fast charging.
How do I work out the cost per mile?
Divide the charging cost by the range that charge adds, which is the energy stored times your car’s miles per kWh. At about 3.5 miles per kWh, a $6.80 charge that adds 126 miles works out to a little over 5 cents a mile.
Is charging at home cheaper than public charging?
Almost always. Home rates are often two to three times lower than public fast-charging rates, so the same charge can cost far less at home. The comparison above shows the gap for your own numbers.

Important

For information and planning only — not financial, tax or legal advice. These figures are estimates; rates, fees and rules vary, so confirm anything that affects a real decision with a qualified professional or the official source.

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