Electrical Panel Load Calculator
Calculate electrical panel load capacity requirements
About this calculator
The Electrical Panel Load Calculator helps determine the proper electrical panel capacity needed for your home or building by calculating total electrical load requirements. This tool evaluates all electrical devices, appliances, and circuits to ensure your panel can safely handle the demand without overloading. It's essential for electrical upgrades, new construction, or adding major appliances to prevent circuit breaker trips, electrical fires, and code violations while ensuring optimal electrical system performance.
How to use
Enter all electrical loads including lighting, outlets, appliances, HVAC systems, and motors with their respective amperage or wattage ratings. Include both continuous and non-continuous loads, applying appropriate demand factors where applicable. The calculator will determine your total electrical load and recommend the minimum panel capacity required to meet electrical codes and safety standards.
Frequently asked questions
What's the difference between continuous and non-continuous loads?
Continuous loads operate for 3+ hours continuously and require 125% capacity calculation, while non-continuous loads operate for shorter periods at 100% rating.
How do I determine my appliance electrical ratings?
Check the nameplate label on each appliance for amperage or wattage ratings, or refer to manufacturer specifications and electrical code requirements.
What safety margin should I include in panel sizing?
Include 20-25% extra capacity beyond calculated loads for future expansion and to prevent operating at maximum capacity continuously.