EV Charging Time Calculator

Summary

Enter your EV battery capacity, current state of charge, desired target charge level, and charger output in kilowatts. The calculator instantly shows estimated charging time in hours and minutes, energy needed, and cost estimate at your local rate.

How it works

1. Subtract the current charge from the target charge and multiply by battery capacity to get the energy deficit in kWh.
2. Divide the energy deficit by the charger power (kW) to get the raw charging hours.
3. Apply a charging efficiency factor (default 90%) to account for losses, giving the wall-clock time in hours and minutes.
4. Multiply the energy drawn by your electricity rate ($/kWh) to estimate the cost of the charge.

Use cases

• Plan a road trip stop by knowing how long you need at a public charger.
• Decide whether overnight Level 1 charging is enough before your morning commute.
• Compare the time savings of installing a Level 2 home charger vs. a standard outlet.
• Estimate electricity cost for a full charge cycle at home.
• Schedule charging during off-peak rate hours to save money.

Frequently Asked Questions