All calculatorsthree phase power calculator
Three Phase Power Calculator
Calculate three-phase electrical power, current, voltage, and apparent power for balanced AC systems.
Professional workflow
Solve common three-phase power questions for motors, panels, and training exercises.
P = √3 × V × I × PF
计算三相功率和电流
💡 计算三相交流功率（平衡负载）
S = √3 × V × I (视在功率)
P = S × cos(φ) (有功功率)
Q = S × sin(φ) (无功功率)
Frequently asked questions
Why is √3 used in three-phase power?
The √3 factor comes from the phase relationship between line voltage and phase voltage in balanced three-phase systems.
Do I need power factor?
For real power in AC systems, yes. Apparent power does not include power factor.
Is this for balanced loads?
Yes. This page assumes a balanced three-phase load unless noted otherwise.
Can I use it for motors?
It can estimate motor electrical values, but nameplate data and code requirements should control real installations.