Single-phase/three-phase electric power calculator

Select phase
Volts V=
Amps I=
KVA= (VA)

What is a Single-Phase/Three-Phase Electric Power Calculator?

A Single-Phase/Three-Phase Electric Power Calculator is a tool that helps calculate electric power in both single-phase and three-phase systems. It determines power consumption, current, or voltage based on the given parameters.

  • Single-phase power is used in homes and small businesses for basic electrical appliances.
  • Three-phase power is used in industrial settings and large buildings where higher power efficiency is required.

Why Use an Electric Power Calculator?

  • Quickly calculate power requirements for electrical systems.
  • Ensure proper wiring and circuit design in residential, commercial, and industrial applications.
  • Optimize power usage to reduce electricity costs and improve efficiency.

How to Calculate Electric Power?

Single-Phase Power Formula:

P = V × I × cos(ϕ)

Where:

  • P = Power (Watts)
  • V = Voltage (Volts)
  • I = Current (Amperes)
  • cos(φ) = Power factor (typically 0.8–1 for most loads)

Three-Phase Power Formula:

For a three-phase system:

P = √3 ​ × V × I × cos(ϕ)

Where:

  • √3 = 1.732 (accounts for three-phase power distribution)
  • V = Line voltage (Volts)
  • I = Line current (Amperes)
  • cos(φ) = Power factor

When to Use It?

  • Single-phase calculations for home appliances and small businesses.
  • Three-phase calculations for industrial machines, motors, and large buildings.
  • Power system design and analysis for engineers and electricians.