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EV Charging Cost Calculator

Calculate how much it costs to charge your electric vehicle. Enter battery size, current and target charge levels, and your electricity rate. See costs and charging times for all levels.

Quick Answer

Charging cost = kWh needed × electricity rate. For a typical 75 kWh EV battery from 20% to 80%, you need 45 kWh. At the US average of $0.13/kWh, that costs about $5.85. Level 1 (120V) takes about 32 hours, Level 2 (240V) about 6 hours, and DC fast charging about 30-55 minutes.

0%Current: 20%Target: 80%100%
Energy Needed
45.0
kWh
Charging Cost
$5.85
at $0.13/kWh

Charging Time by Level

32 hr 9 min
Level 1 (120V)
Standard household outlet
1.4 kW
5 hr 51 min
Level 2 (240V)
Home charger / public AC
7.7 kW
54 min
Level 3 / DC Fast
DC fast charging station
50 kW
18 min
Level 3 / Supercharger
Tesla Supercharger / CCS
150 kW

About This Tool

The EV Charging Cost Calculator estimates the electricity cost and time required to charge an electric vehicle. It accounts for your battery size, current charge level, target charge level, and local electricity rate. The tool shows charging times for all four common charging levels, from a standard 120V outlet to DC fast charging.

Understanding Charging Levels

Level 1 charging uses a standard 120V household outlet and delivers about 1.4 kW, adding roughly 3-5 miles of range per hour. Level 2 uses a 240V circuit (like a dryer outlet) and delivers 6-19 kW, adding 12-60 miles per hour. Level 3 DC fast charging bypasses the onboard charger and feeds DC power directly to the battery at 50-350 kW, adding 100-200+ miles in 20-30 minutes.

Why Charging Slows Above 80%

Lithium-ion batteries accept charge fastest when they are depleted and slow down as they approach full. This is why DC fast charging typically quotes times "to 80%" rather than 100%. Charging from 80% to 100% can take almost as long as charging from 20% to 80%. For daily driving, charging to 80% is recommended as it is faster, cheaper, and better for long-term battery health.

Home Charging vs. Public Charging

Home charging at the US average of $0.13/kWh is significantly cheaper than public charging, which ranges from $0.20 to $0.60/kWh depending on the network and speed. Many EV owners charge overnight at home using off-peak electricity rates, which can be as low as $0.05-0.08/kWh. A Level 2 home charger typically costs $500-1,500 installed and pays for itself within 1-2 years through savings over public charging.

Frequently Asked Questions

How much does it cost to charge an electric car at home?
At the US average of $0.13/kWh, a full charge for a typical 75 kWh battery costs about $9.75. For a daily commute using 25-30% of the battery, that's about $2.50-3.00 per charge. Monthly home charging costs for average drivers run $30-60, compared to $120-200+ for gasoline in a comparable vehicle.
How long does it take to charge an EV?
It depends entirely on the charging level. Level 1 (120V outlet): 40-60 hours for a full charge. Level 2 (240V home charger): 6-12 hours. DC fast charging: 20-60 minutes to 80%. Most EV owners charge overnight at home with Level 2, making charge time largely irrelevant for daily use.
Is it cheaper to charge an EV or fill up with gas?
EVs are significantly cheaper to fuel. The average EV uses about 30 kWh per 100 miles. At $0.13/kWh, that's $3.90 per 100 miles. A 30 MPG gas car at $3.50/gallon costs $11.67 per 100 miles, about 3 times more. Even at higher electricity rates, EVs are typically 2-3x cheaper per mile than gasoline vehicles.
Should I charge my EV to 100% every time?
No. For daily driving, charging to 80% is recommended. Lithium-ion batteries experience more stress when held at very high or very low states of charge. Charging to 80% daily and only to 100% before long trips maximizes battery longevity. Most automakers recommend an 80% daily limit in their owner's manuals.
What electricity rate should I use?
Check your utility bill for your rate per kWh. The US national average is about $0.13/kWh, but rates vary widely: $0.08 in the Southeast to $0.25+ in California and New England. Many utilities offer time-of-use rates with cheaper overnight electricity ($0.05-0.08/kWh) that is ideal for EV charging. Contact your utility about EV-specific rate plans.

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