Sam Gorman

Estimate LED lumens, watts, or room light count using lumens per watt, bulb lumens, and a usable light factor.

Calculate motor horsepower from volts, amps, efficiency, power factor, and DC, single-phase AC, or three-phase AC supply.

Calculate single-phase AC real power, current, voltage, or power factor from RMS electrical values.

Convert AC amps and volts to kVA for single-phase or balanced three-phase systems using the matching voltage reference.

Convert kVA to amps for single-phase and three-phase circuits with the correct voltage basis.

Convert watts, VA, and power factor for UPS, generator, inverter, or transformer sizing with optional extra room.

Convert volt-amperes to watts with a power factor, and optionally check the result against a UPS listed watt limit.

Size a transformer from kW and power factor or from volts and amps, with loading limit, growth, standard size, and full-load amps.

Calculate NEC-style electrical box fill by AWG, grounds, devices, clamps, and box volume, with pass or short result.

Check conduit fill, NEC fill percent, room left, and the smallest supported conduit size for mixed conductor rows.