Calculate how much it costs to charge your electric vehicle at home or at a public charger.
EV charging cost depends on two variables: how much electricity your car uses (measured in kWh per mile) and what you pay per kWh. The formula is simple — multiply your battery size by your electricity rate to get the cost per full charge, then multiply by how often you charge to get monthly costs. For most home chargers at average US electricity rates, a full charge costs $10–$18.
The big picture: home charging is dramatically cheaper than public fast charging, and both are cheaper per mile than gasoline for most drivers. The key to maximizing savings is charging at home as much as possible and treating public fast charging as a convenience for long trips rather than a daily habit.
Level 1 charging uses a standard 120V household outlet — no additional equipment needed. It delivers about 3–5 miles of range per hour, which is enough for drivers who put on fewer than 30–40 miles per day. Most EVs can fully recharge overnight on Level 1 if your daily mileage is modest. Cost is identical to your normal home electricity rate.
Level 2 charging requires a 240V circuit and a home charger (EVSE), which costs $400–$800 for the unit plus $200–$600 for professional installation. It delivers 20–35 miles of range per hour, fully charging most EVs in 6–10 hours. The investment pays for itself quickly through the fuel savings, and many utilities offer rebates that reduce upfront costs.
The US average electricity rate is around $0.16/kWh, but there's significant regional variation. Hawaii averages $0.38/kWh — the most expensive in the nation. Louisiana and Oklahoma average around $0.10–$0.11/kWh. California, Connecticut, and Massachusetts typically run $0.22–$0.30/kWh. If you're in a high-rate state, your EV charging costs will be higher, though still less than gasoline in most cases.
Many utilities offer time-of-use (TOU) rates with lower prices during off-peak hours — typically overnight between 9pm and 6am. If your utility offers TOU pricing, scheduling charging for off-peak hours can reduce your effective electricity rate by 30–50%, making home charging even more economical.
DC fast chargers (Level 3) can deliver 100–250+ miles of range in 20–45 minutes, making them essential for road trips. The cost, however, is significantly higher than home charging — typically $0.30–$0.50/kWh at major networks. Tesla Superchargers currently average around $0.25–$0.35/kWh for non-Tesla vehicles. Electrify America and EVgo tend to run $0.43–$0.48/kWh.
Some networks charge by the minute rather than by kWh, which can make cost comparison confusing. A fast charger billing at $0.16/minute on a car that charges at 50 kW is effectively charging you $0.19/kWh — reasonable. On a car that only charges at 25 kW at the same rate, you're paying $0.38/kWh — much less efficient. Always check the billing method before committing to a charging session.
At $0.16/kWh with an efficiency of 4 miles/kWh, you pay about $0.04 per mile in electricity. A gas vehicle getting 30 MPG at $3.50/gallon costs $0.117 per mile — nearly 3x more. The savings compound quickly: a driver putting 15,000 miles per year on an EV saves roughly $1,155/year in fuel costs compared to a 30 MPG gas car. Over 5 years, that's nearly $5,800 in fuel savings at current prices.
At public fast charging rates of $0.40/kWh, the per-mile cost rises to about $0.10 — still competitive with or slightly cheaper than gasoline, but the advantage shrinks considerably. This is why EV economics work best for drivers with home charging access.
The battery capacity listed on your EV (e.g., 75 kWh) represents the total usable storage. Manufacturers typically recommend charging to 80% for daily use to extend battery longevity — saving 100% charges for road trips. At 80% of a 75 kWh battery and 4 miles/kWh efficiency, you're adding about 240 miles of range per charge. Cold weather, highway speeds, and heavy use of climate control can reduce real-world range by 15–30%.
This calculator estimates home EV charging costs based on the values you enter. Actual costs depend on your specific electricity rate, real-world vehicle efficiency, and charging equipment losses. Contact your utility provider for accurate electricity rate information. This tool is for informational purposes only.