Power Factor from Watts, Current and Voltage

Power factor is a number (less than or equal to 1.0) which represents the ratio of real power (Watts) to reactive power (VARs) in an AC electrical system. Since voltage is a constant, the relationship is the same for the corresponding currents:

Power Factor Triangle

Unity power factor (a power factor of 1.0) ids where the current and voltage are completely in phase, i.e. there is no reactive component.

Make sure you enter either current in Amps and watts in Watts, or current in kA and watts in kW!

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