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 Power Calculator
Calculates electrical power in watts from voltage and current using P = V Γ I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use.
Fill in the required fields to see your result.
Key differences
| Electrical Load Calculator | Electrical Power Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 5 | 2 |
| Result | Required Panel Capacity (W) | Power (W) |
| 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. | Calculates electrical power in watts from voltage and current using P = V Γ I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use. |