Electrical Load Calculator.

Add up appliance amperages and apply NEC demand factors. Use the calculator — check appliances and get estimated total amps, kW, and suggested panel size.

HVAC (30-50A), oven (30-50A), EV charger (16-80A), dryer (30A), water heater (20-30A). The calculator shows a per-category breakdown.

Per NEC 80% rule: 15A circuit → 12A continuous, 20A → 16A, 30A → 24A. Use our Breaker Size Calculator for individual circuits.

Connected load = sum of all loads. Different from demand load (which applies diversity factors). The calculator shows your connected load.

A typical 2,000 sq ft home uses 100-200A. Use the calculator — check appliances to see your estimated total in amps and kW.

Modern homes typically need 200A. With EV charger or pool pump, 225-400A may be needed. The calculator suggests a panel size automatically.

Each appliance has a nameplate rating in amps or watts. Convert watts ÷ voltage = amps. The calculator lists common appliances with typical ratings.

Demand load applies diversity factors (not all appliances run simultaneously). NEC Article 220 provides demand factors. For a precise calculation, consult a licensed electrician.

Proper load calculation prevents panel overload, breaker trips, and electrical fires. Essential for new construction, renovations, and appliance additions.

This provides a simplified estimate. A professional load calculation per NEC Article 220 is more precise. Consult a licensed electrician for final sizing.