EV Charger Circuit Calculator

Size the electrical circuit for a Level 2 EV charger: breaker, wire gauge, daily energy needs, and charging costs.

Charger Amperage

Circuit Voltage

Electrical Panel Size

Daily Driving Distance

miles

EV Efficiency

mi/kWh

Tab to move between fields

Required Circuit Amps

50 A

Breaker Size50 A

Wire Gauge (AWG)6 AWG

Daily Energy Needed10 kWh

Nightly Charge Time1 hours

Monthly Charging Cost$39

How to Use This Calculator

Enter Charger Amps (Level 2 chargers are typically 32–50 A) and Voltage (240 V for Level 2).
Input your Existing Panel Amps to check whether a panel upgrade is required for the new circuit.
Enter Daily Miles driven so the calculator can show Daily kWh needed and Charge Time Hours.
Review Required Circuit Amps and Breaker Size to specify the correct breaker and wiring for your electrician.
Check Wire Gauge — undersized wire is a fire hazard; the calculator selects the NEC-compliant gauge.
Use Monthly Charging Cost to estimate the impact on your electricity bill at current utility rates.

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