Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Electrical
Electrical Load Calculator
Compute the total electrical demand of a building by summing lighting, appliance, HVAC, and motor loads, then applying an NEC-compliant demand factor. Used by electricians and engineers to size service panels and main breakers.
Fill in the required fields to see your result.
Electrical
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.
Fill in the required fields to see your result.
Key differences
| Electrical Load Calculator | Electrical Load Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 5 | 4 |
| Result | Required Panel Capacity (W) | Required Service Size (kW) |
| What it does | Compute the total electrical demand of a building by summing lighting, appliance, HVAC, and motor loads, then applying an NEC-compliant demand factor. Used by electricians and engineers to size service panels and main breakers. | 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. |