Estimate electrical panel load, demand load, panel load percentage, remaining panel capacity, service size, watts, volt-amps, and amperage from common residential or light commercial loads.
Connected load:
The calculator adds general lighting load, appliance circuit estimates, laundry circuit estimates, and fixed equipment loads.
Demand load:
The connected load is multiplied by the selected demand factor and continuous load factor.
Panel percentage:
The demand amps are compared to the panel size to estimate panel load percentage and remaining capacity.
A panel load calculator helps estimate whether an electrical panel has enough capacity for existing and planned loads.
It can help with service planning, subpanel planning, EV charger planning, appliance additions, HVAC upgrades, workshop circuits, garage panels, shed panels, and general electrical planning.
Your result shows connected load, demand load, demand amps, panel load percentage, remaining amps, remaining watts, panel capacity, recommended panel size, load category, and comparison scenarios.
Add the electrical loads in watts or volt-amps, apply any appropriate demand factors, convert to amps, then compare that demand amperage to the panel size.
Panel load percentage compares estimated demand amps to the panel rating. For example, 140 amps on a 200 amp panel is 70% panel load.
No. Connected load is the total of listed loads. Demand load is an adjusted estimate based on how loads are expected to operate together.
No. This is a simplified planning tool. Official panel and service calculations depend on electrical code, dwelling rules, equipment nameplates, demand factors, service conductors, and local requirements.