Electrical power, energy and load calculations
Start by separating real power (kW), apparent power (kVA) and energy over time (kWh). Build load calculations from the equipment that operates together and keep electrical input distinct from motor shaft output.
kW to kVA — Convert real input power using power factor.
kVA to kW — Find real power from apparent power and power factor.
kW to kWh — Relate input power to operating time.
kW to amps — Convert input power to circuit current.
Electrical panel load schedule — Organize circuit inputs and inspect the tool’s aggregation model.
Generator planning tools — Keep running loads and starting demand separate.
Energy use is not the same as peak demand. Equipment sizing also depends on load behavior, installation conditions and the particular rules applicable to the system.
kW vs kWh guide — Compare power, energy and operating schedules with worked examples.
kW vs kVA guide — Understand power factor, equipment limits and motor efficiency.
Quickly determine accurate service requirements for mixed loads with our instant 120/208V Wye feeder sizing calculator, giving electricians and engineers clear, code-minded results in seconds.
Use the receptacle load calculator to instantly compare general-purpose and dedicated circuit totals so you can size circuits confidently in seconds. Whether you’re an electrician or a DIYer, get accurate load totals fast and avoid costly mistakes.
Picking the right breaker and fuse size doesnt have to be confusing — this friendly guide explains standard ratings, rounding rules, and simple steps to ensure safe, reliable circuit protection.