PowerCalc calculates electrical power loads.
  • How much power do I need for these lights?
  • How much wattage can this 12 volt supply handle?
  • How much wattage can this multi-phase service handle?
Enter a wattage to determine the electrical current in amps. Or enter rated ampacity of a device and see maximum wattage load. Works for any voltage.

In resistive mode, select two or three phase service to see amps per leg and total wattage for a multiphase power distribution.

AC Inductive mode allows setting of power factor and selection of single phase or three phase motor power calculations.