Estimate how much it costs to charge your electric vehicle at home, per mile driven, and per month based on your driving habits.
Charging an electric vehicle at home costs the battery's usable capacity in kWh, multiplied by your electricity rate, plus a small energy loss that occurs during the AC-to-DC conversion in the charging process. This calculator turns those inputs into a clear cost per charge, per mile, and per month.
Cost per Full Charge = Battery Capacity × (1 + Efficiency Loss ÷ 100) × Electricity Rate. Cost per Mile = Cost per Full Charge ÷ Range. Monthly Cost = Cost per Mile × Monthly Miles Driven.
A 75 kWh battery charged at $0.15/kWh with a 10% efficiency loss costs about $12.38 per full charge. With a 260-mile range, that's about $0.048 per mile, or $4.76 per 100 miles. Driving 1,000 miles per month would cost roughly $47.60 in home charging.
To compare against a gasoline vehicle, divide a gallon of gas's price by your gas car's MPG to get its cost per mile, then compare directly to the EV's cost per mile above. Public fast-charging is typically more expensive per kWh than home charging, so costs will be higher on road trips that rely on public stations.
It multiplies your battery's energy needed (kWh) by your electricity rate per kWh, accounting for charging efficiency losses if included.
Some energy is lost as heat during the AC-to-DC conversion and battery charging process, so the electricity drawn from the wall is slightly more than what actually reaches the battery.
Many EV cost calculators let you compare cost-per-mile between electricity and gasoline, which often (though not always) favors electric charging depending on local electricity and fuel prices.