EV Charging Cost Calculator
Estimate energy from the wall, charging time and cost for an EV session.
Result
Estimated charging cost: $8.00Estimate
Charging power and efficiency vary with temperature, battery state, vehicle limits and accessory loads. Enter average wall-side power for the most useful time estimate.
- Energy drawn from the wall
- 50 kWhEstimate
- Energy added to the battery
- 45 kWhEstimate
- Ideal charging time in hours
- 6.94Estimate
- Real charging may slow near a high state of charge.
https://calcgallery.com/energy-utilities/ev-charging-cost-calculator/
Results are estimates based on the ratings, usage and prices you enter. Actual consumption, losses, tariffs and equipment performance vary. Check your bill, meter and manufacturer information before relying on the result. Read the full disclaimer
How to use the EV Charging Cost Calculator
- Enter usable battery capacity and the starting and ending state of charge.
- Enter wall-to-battery efficiency, average charger power and the electricity price.
- Read wall energy for billing, stored energy for the battery and ideal time for planning.
The meter pays for wall energy
Adding 45 kWh to a battery requires more than 45 kWh from the outlet. Charging efficiency represents the share of wall energy that reaches the battery.
stored energy = battery capacity × (ending charge − starting charge)wall energy = stored energy ÷ charging efficiencyideal time = wall energy ÷ average charger powerCost uses wall energy because that is what the electricity meter records. The time is an ideal average-power estimate and does not model a vehicle’s charging curve.
The U.S. Department of Energy Alternative Fuels Data Center explains charging levels, equipment power and the factors that affect charging time.
With your numbers
- Battery energy added = 75 kWh × (80% − 20%) = 45 kWh
- Wall energy = 45 kWh ÷ 90% = 50 kWh
- Cost = 50 kWh × $0.16 per kWh = $8.00
Quick reference
Charging power and efficiency vary with temperature, battery state, vehicle limits and accessory loads. Enter average wall-side power for the most useful time estimate.
| Example | Estimated charging cost |
|---|---|
| 75 kWh battery, 20% to 80% | $8.00 |
| 60 kWh battery, 10% to 90% | $10.91 |
| 100 kWh battery, 30% to 70% | $6.52 |
| 50 kWh battery, 25% to 100% | €12.50 |
| 82 kWh battery, 40% to 80% | €8.72 |
| 40 kWh battery, 50% to 60% | €0.85 |
Common questions about the EV Charging Cost Calculator
- Why is wall energy higher than battery energy?
- Some energy is lost in conversion, cables, battery conditioning and heat. Dividing stored energy by charging efficiency estimates what the meter supplies.
- Why can real charging take longer?
- Vehicles limit power, especially near a high state of charge or in extreme temperatures. The charger rating is a ceiling, not a promise of constant power.
- Should I enter battery gross or usable capacity?
- Use usable capacity when available, because the state-of-charge display normally refers to the usable window protected by the vehicle.