Calculate exactly how long it will take to charge your electric vehicle based on battery capacity, charger power, and current charge level
Check your vehicle specifications for total battery capacity
Most EVs recommend charging to 80% for daily use
Typical efficiency is 85-95%. Use 90% as a safe estimate.
This is an estimate based on ideal conditions. Actual charging time may vary due to temperature, battery condition, and vehicle charging curves.
Standard 120V household outlet
240V dedicated charging station
High-power commercial stations
Cold weather (below 32°F) can reduce charging speed by 20-40%. Batteries charge slower when cold to prevent damage.
Charging slows significantly above 80% to protect battery health. The last 20% can take as long as the first 80%.
Your vehicle's maximum charging rate limits speed. A 7.2 kW onboard charger won't charge faster even with a 19.2 kW station.
Older batteries may charge more slowly as their capacity and efficiency decrease over time.
Voltage fluctuations or insufficient electrical capacity can reduce actual charging power below the charger's rated output.
Long or low-quality cables can cause power loss. Use the shortest cable possible and ensure proper connections.
Based on a typical 75 kWh battery charging from 20% to 80% (45 kWh needed)
* Costs based on average electricity rate of $0.13/kWh for home charging and $0.30/kWh for DC fast charging
EV batteries use a charging curve that slows down significantly above 80% to protect battery health and longevity. The battery management system reduces charging power to prevent overheating and cell damage. This is why most manufacturers recommend charging to 80% for daily use and only charging to 100% when needed for long trips.
This calculator provides estimates based on ideal conditions using the formula: (Battery Capacity × Charge Range) ÷ (Charger Power × Efficiency). Actual charging times may vary by ±20% due to temperature, battery condition, charging curves, and other factors. Use it as a planning tool rather than an exact prediction.
Only up to your vehicle's maximum charging rate. If your EV has a 7.2 kW onboard charger, installing a 19.2 kW station won't charge faster. Check your vehicle specifications for maximum AC charging rate before upgrading your home charger.
Level 2 charging is 6-8 times faster than Level 1, allowing you to fully charge overnight (4-8 hours) instead of 40-50 hours. For most EV owners who drive 30-50 miles daily, Level 2 ensures your vehicle is always ready. The installation cost ($800-$2,500) pays for itself through convenience and avoiding public charging fees.
Yes, significantly. Below 32°F (0°C), charging can slow by 20-40% because batteries must warm up before accepting full power. Some EVs have battery preconditioning features that warm the battery before charging to minimize this effect. Parking in a garage helps maintain warmer battery temperatures.
Charge at home overnight with Level 2 charging during off-peak hours (if your utility offers time-of-use rates). Charge to 80% for daily use, only going to 100% before long trips. Avoid frequent DC fast charging as it costs 2-3x more per kWh and can accelerate battery degradation if used exclusively.
At the average U.S. electricity rate of $0.13/kWh, charging a 75 kWh battery from 20% to 80% (45 kWh) costs about $5.85. This provides roughly 180-200 miles of range. Compare this to $25-35 for the same range in a gas vehicle. Annual charging costs for 12,000 miles average $500-700 vs. $1,500-2,000 for gasoline.
No. Charging to 100% regularly accelerates battery degradation. Most manufacturers recommend charging to 80% for daily use to maximize battery lifespan. Only charge to 100% when you need the extra range for long trips. Modern EVs allow you to set a charge limit in the vehicle settings.
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