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Electrical Load Calculator

Determine the total electrical demand of a building and the minimum service panel size needed to support it safely. Used by electricians and contractors during new construction or renovation planning.

Building Square Footage (sq ft)

Major Appliances Load (W)

HVAC System Load (W)

Building Type

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Electrical

Electrical Panel Load Calculator

Estimate the total ampere demand on an electrical panel by applying NEC-style load factors to lighting, receptacle, appliance, and motor circuits, then check it against the panel's main breaker rating. Ideal for panel schedule design, load additions, and service upgrade evaluations.

Panel Main Breaker Rating

Lighting Circuit Load (W)

Receptacle Circuit Load (W)

Appliance Circuit Load (W)

Motor Circuit Load (W)

Panel Voltage

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Key differences

	Electrical Load Calculator	Electrical Panel Load Calculator
Category	Electrical	Electrical
Inputs required	4	6
Result	Required Service Size (kW)	Calculated Panel Load (A)
What it does	Determine the total electrical demand of a building and the minimum service panel size needed to support it safely. Used by electricians and contractors during new construction or renovation planning.	Estimate the total ampere demand on an electrical panel by applying NEC-style load factors to lighting, receptacle, appliance, and motor circuits, then check it against the panel's main breaker rating. Ideal for panel schedule design, load additions, and service upgrade evaluations.