Calculate real, reactive, and apparent power for three-phase electrical systems.
System Parameters
V
A
Calculation Results
Enter voltage, current, and power factor
About this calculator
Quick Reference
PReal Power (Watts)
SApparent Power (Volt-Amps)
QReactive Power (VAR)
√3≈ 1.732
Overview
Three-phase power is the standard method of alternating current electric power generation, transmission, and distribution. It uses three wires (or four including neutral) to carry current.
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Pro Tips
Standard line voltages include 208V, 480V, and 600V in North America.
Power factor typically ranges from 0.7 to 1.0 (ideally 1.0).
Real power (W) is what performs work; apparent power (VA) is what the system must carry.
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Fun Facts
"Nikola Tesla was a major promoter and developer of three-phase AC systems."
"Three-phase motors can start themselves without special capacitors or windings."
"Three-phase systems use less conductor material than single-phase for the same power."
