Tool 10 · EV cost
EV charging cost calculator — home vs gas
Estimate monthly home charging cost from miles, efficiency and electric rate. Then compare it with a gasoline car without pretending every driver has the same tariff.
Use this free EV charging cost calculator to estimate monthly home charging energy, electricity cost and a gasoline comparison. Enter monthly miles, EV efficiency and your home rate for an instant planning result.
No email required. Instant browser-based planning math with clear assumptions.
What this EV charging calculator does — and does not do
- Home charging cost: battery-side consumption is divided by charging efficiency; wall-side consumption is used directly, so losses are not counted twice. The 90% efficiency is an editable example, not a vehicle measurement. A single entered rate is used; hourly tariffs and fixed charging fees are not modeled.
- Gas comparison: miles ÷ MPG × gas price. It is a frame, not a promise — insurance, maintenance and depreciation are outside this tool.
- Solar next: if the EV load is big, use the solar + EV calculator to size extra panels for the driving load.
What this tool estimates
Use this free EV charging cost calculator to estimate monthly home charging energy, electricity cost and a gasoline comparison. Enter monthly miles, EV efficiency and your home rate for an instant planning result.
No email required. Results are calculated in your browser; use them as a planning estimate, not a guaranteed quote or savings forecast.
How the math works
Monthly energy is miles times kWh per 100 miles divided by 100. For battery-side consumption, divide by entered charging efficiency to get wall energy. For wall-side consumption, do not add losses again. Home cost is wall energy times the entered flat rate. Gas cost is miles divided by MPG times fuel price; neither is a full ownership-cost model.
Key variables that change your result
EV efficiency
kWh per 100 miles changes with vehicle model, driving speed, weather and use of heating or air conditioning.
Home electricity rate
Time-of-use rates and overnight charging can differ from an average utility-bill rate.
Gas comparison
Fuel comparison excludes maintenance, insurance, depreciation, public charging and other ownership costs.
Questions homeowners ask
How much does it cost to charge an EV at home?
What information do I need for an EV charging estimate?
Does this include public charging?
State context matters
Find your state solar guide
Costs, incentives, export rules and payback inputs vary by state. Open your state guide before treating any calculator result as a buying decision.