CostEV Charging Cost Calculator
Estimate the electricity cost to charge an electric vehicle at home or from another electricity source.
Enter values and press Calculate.
How this calculator works
The requested battery energy is adjusted for charging losses, then multiplied by your electricity price.
How to use the result
Change one input at a time to compare scenarios. This helps you see which factor has the biggest effect on your total cost or savings.
Frequently asked questions
Why include charging efficiency?
Some energy is lost as heat and through charging electronics, so the grid usually supplies more energy than reaches the battery.
Does this include public charging fees?
Only if you enter the effective electricity or charging price you pay.
Can I estimate a partial charge?
Yes. Enter the percentage of battery capacity you plan to add.
From wall energy to cost per mile
The battery energy added is not always the same as electricity drawn from the wall. Charging losses vary with temperature, charging speed and vehicle systems, so the calculator includes a loss assumption. Divide the wall-to-battery charging cost by the usable driving miles added to estimate electricity cost per mile.
Adding 54 kWh to the battery with 10% charging losses requires about 60 kWh from the wall. At $0.18 per kWh, the charge costs about $10.80. If it adds 210 miles of range, electricity cost is roughly 5.1¢ per mile.
Home versus public charging
- Use your all-in home electricity rate, including variable delivery charges where applicable.
- For public charging, enter the station price and account for session or parking fees separately.
- Time-of-use plans can make the same charge cheaper overnight and more expensive at peak hours.
- Cold weather, high speed, towing and cabin conditioning can reduce miles gained from the same energy.