Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
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.
Key differences
| Electrical Power Calculator | Electrical Load Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 2 | 5 |
| Result | Power (W) | Required Panel Capacity (W) |
| What it does | 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. | 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. |