How this calculator works
Calculate home-charging electricity cost per mile, per 100 miles, and per month from efficiency, charging losses, and local electricity price.
Use wall energy for cost
Vehicle efficiency describes battery energy used for driving. Home charging draws somewhat more energy from the wall because conversion, battery conditioning, and charging equipment are not lossless.
Efficiency changes with conditions
Speed, temperature, cabin heating, tires, elevation, towing, and short trips can change miles per kWh. Use an efficiency value from the season and driving pattern you want to model.
Choose the applicable rate
Use the marginal or time-of-use price that applies while charging. An all-in historical bill price is convenient for comparison but may include fixed charges that do not increase with the next kWh.
Frequently asked questions
Is charger power needed for cost per mile?
No. Charger power affects charging speed. Miles driven, vehicle efficiency, losses, and electricity price determine energy cost.
Does the estimate include public charging?
No. Model public charging separately using the price structure shown by that network.
How does this differ from the EV charging calculator?
This page emphasizes a normalized cost per mile and per 100 miles; the charging calculator emphasizes total wall energy and monthly charging cost.
Use equipment documentation, your utility rate schedule, and measured data when they are available.