EV Charging Time Calculator
Calculate how long it takes to charge your electric vehicle with different charging speeds
Enter your charging details and click "Calculate" to see estimated charging time
Most DC fast chargers automatically reduce charging power after your battery reaches about 80% to protect battery health and prevent overheating. This means charging from 80% to 100% is much slower than from 20% to 80%.
This calculator assumes constant charging power for simplicity, so if you are calculating charging time above 80%, the real charging time may be longer than shown. For the most accurate results, use this tool for estimates up to 80% state of charge.
Charging Time Guide
Understanding charging speeds and factors that affect charging time
Charger Types & Speeds
Home AC (Level 2)
3.7-22 kW
Most common home charging. Takes 4-12 hours for full charge depending on power level.
DC Fast Charging
50-150 kW
Public fast chargers. Can charge to 80% in 30-60 minutes.
Ultra Fast DC
150-350 kW
Fastest available charging. Can add 200+ miles in 15 minutes.
Factors Affecting Charging Speed
Technical Factors
Battery state of charge
Charging slows down significantly after 80%
Temperature
Cold weather can reduce charging speed by 20-40%
Battery age
Older batteries may charge more slowly
Charging Efficiency
AC Charging
85-90% efficiency (power conversion losses)
DC Fast Charging
90-95% efficiency (minimal conversion)
Tesla Supercharger
Up to 95% efficiency
Optimal Charging Tips
Daily Charging
Charge to 80% for daily use to optimize battery life
Fast Charging
Use DC fast charging for long trips, not daily use
Peak Hours
Charge during off-peak hours to save on electricity costs
Preconditioning
Warm up battery before fast charging in cold weather
Charging Power
Higher kW chargers provide faster charging speeds
Charging Curve
Charging slows down as the battery approaches full capacity
Optimal Range
Charging from 20% to 80% typically provides the fastest speeds