Monthly EV Charging Cost Calculator
Calculate your monthly EV charging cost from miles driven, efficiency, and the split between home and public fast charging rates.
Home vs Public Charging
The cost difference between home charging and DC fast charging is often dramatic. Home electricity in the US averages around $0.13 per kWh. DC fast chargers typically cost $0.30 to $0.50 per kWh, sometimes more. A driver who charges mostly at home pays roughly 2 to 3 cents per mile in electricity. The same driver using only fast chargers might pay 8 to 12 cents per mile.
Calculating Monthly Cost
Total energy needed = monthly miles / efficiency (miles per kWh) Home charging cost = (total kWh x home percentage) x home rate Public charging cost = (total kWh x public percentage) x public rate Monthly total = home cost + public cost
Most EVs achieve 3 to 4 miles per kWh in mixed driving. Highway driving at high speed consumes more: 2.5 to 3 miles per kWh. City driving with frequent regenerative braking can reach 4 to 5 miles per kWh.
Charging Efficiency Loss
AC home charging loses about 10 to 15% to heat in the on-board charger. DC fast charging is more efficient per session. This calculator uses your stated efficiency, which should already reflect real-world consumption including charging losses. If your car displays miles-per-kWh from the trip meter, use that number.
Comparing to Gasoline
A gas car getting 30 MPG at $3.50/gallon costs about $11.67 per 100 miles. At $0.13/kWh and 3.5 miles/kWh, an EV costs about $3.71 per 100 miles. Even at $0.40/kWh public charging, that is $11.43 per 100 miles, roughly break-even with a 30 MPG gas car.