EV Charging Cost Calculator: Charging at Home vs. Gas
Enter the price you pay per kWh, your EV, and how far you drive to estimate what charging at home costs, and how it compares with gas. It works with any utility, using one price for every kWh.
- Enter your Price per kWh in cents, from your bill or your utility’s rate schedule. If it’s shown in dollars, multiply by 100.
- Choose your Vehicle, or choose Enter efficiency myself and enter its kWh per 100 miles. Enter your Miles a year and the share you charge at home.
- Optionally, enter a gas car’s fuel economy and the gas price to compare with gas.
- Read your monthly and yearly charging cost, the kWh it uses, and the cost per mile. Share the page’s address to share your inputs.
Utilities with built-in rate plans
Have one of these utilities? Its rate plans, tiers, and time-of-use periods are built in, so you can see what an EV adds to your bill on each plan:
- Georgia Power EV charging cost (Georgia Power Company)
- PG&E EV charging cost (Pacific Gas and Electric Company)
- SMUD EV charging cost (Sacramento Municipal Utility District)
How this calculator works
- Your EV’s monthly kWh at home is its efficiency (kWh per 100 miles) × miles a year ÷ 100 ÷ 12 × the share charged at home.
- The monthly cost is that kWh × your price per kWh, and the yearly estimate is the monthly cost × 12. The cost per mile is the yearly cost ÷ the miles you charge at home.
- Vehicle efficiency is the EPA combined rating from FuelEconomy.gov web services (U.S. Department of Energy and U.S. EPA). It includes charging losses, so the calculator doesn’t add any.
- The gas comparison covers only the miles you charge at home: those miles ÷ fuel economy × the gas price, ÷ 12 for a month.
- Every kWh is priced the same. If your plan is cheaper overnight, enter the price for the hours you charge. Fixed charges, taxes, and credits aren’t included.