EV Charging Time & Miles-per-Hour Added Calculator
EV drivers planning overnight charging schedules and road trips. Calculates time to charge from X% to Y% and miles of driving range added per hour of charging based on voltage, current, and EV efficiency.
Step-by-Step Derivation ▼ Show Steps
Calculations adhere to standard electrical engineering physics and National Electrical Code (NFPA 70) regulations.
Engineering Principles & Calculations
This calculator uses the exact mathematical relationships between Charging Voltage (120V, 240V), Amps (12A, 16A, 32A, 40A, 48A), EV Battery Pack Size (kWh: 40-100 kWh), Efficiency (default 3.5 miles/kWh) to determine Charging Power (kW), Time to Desired Charge (Hours & Minutes), Range Added per Hour (Miles/Hour). In practical installations, factors such as ambient raceway temperature, harmonic distortion, duty cycle continuous operation, and conductor impedance must be accounted for by a certified electrician.
Calculates time to charge from X% to Y% and miles of driving range added per hour of charging based on voltage, current, and EV efficiency.
Typical Application & Industry Guidelines
EV drivers planning overnight charging schedules and road trips.
EV Charging Time & Miles-per-Hour Added Calculator Benchmark Lookup Table
| Charging Level | Voltage & Amps | Net Power (kW) | Miles per Hour | Time for 60 kWh (20-80%) |
|---|---|---|---|---|
| Level 1 (Standard 120V Outlet) | 120V @ 12 Amps | 1.3 kW | 3 - 5 miles/hr | 36 - 45 Hours |
| Level 2 (Dryer Outlet / NEMA 14-30) | 240V @ 24 Amps | 5.2 kW | 18 - 22 miles/hr | 8.5 Hours |
| Level 2 (Standard EV / NEMA 14-50) | 240V @ 32 Amps | 6.9 kW | 25 - 30 miles/hr | 6.5 Hours (Overnight) |
| Level 2 (Fast 40A Station) | 240V @ 40 Amps | 8.6 kW | 30 - 35 miles/hr | 5.2 Hours |
| Level 2 (Max Hardwired 48A) | 240V @ 48 Amps | 10.4 kW | 40 - 45 miles/hr | 4.3 Hours |