EV Charger Panel Load Calculator

Step 1 — Select Your Panel Service Size

Current Load (without EV charger) -- A

Load WITH 40A EV Charger Added -- A

Calculating...

Step 2 — Enter Your Major Appliances

Only electric appliances count toward load. Gas appliances draw negligible electrical load. Select "None / Gas" for any appliance you don't have or that runs on gas.

❄ Heating / Cooling

Central A/C

Electric heat / heat pump

👖 Water & Laundry

Water heater

Electric dryer

🍳 Kitchen

Electric range / oven

Dishwasher

🏠 General & Other

General lighting/outlets

Pool / hot tub

Workshop / sub loads

Step 3 — Select Your EV Charger

16A charger (20A circuit) 24A charger (30A circuit) 32A charger (40A circuit) 40A charger (50A circuit) — most common 48A charger (60A circuit)

Load Item	Demand Factor	Calculated Amps

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How This Calculation Works

This calculator applies the NEC Article 220 load calculation method with standard demand factors. The NEC allows reduced demand factors for appliances that don't all run simultaneously at full load. An electrician will do a formal load calculation before pulling your permit. This tool gives you a reliable preview of what that calculation will show.