Electrical Load Calculator — Free Online Calculator
Calculate your home's total electrical load to determine the correct service panel size per NEC Article 220.
How to Use This Calculator
Enter home square footage, total 240V appliance wattage (range, dryer, water heater), and largest HVAC load.
The Formula Explained
NEC 220 standard calculation: General lighting = sqft × 3 VA + 3000 (small appliance) + 1500 (laundry). Apply demand: first 10kW at 100%, remainder at 40%. Add 240V appliances and largest motor load at 100%.