Enter the inductive reactance, capacitive reactance, and resistance. The calculate will evaluate and display the phase angle in degrees or radians.

Phase Angle Formula

The following equation can be used to calculate the phase angle of a coil.

A = tan^-1(XL-XC/R)

  • Where A is the phase angle
  • XL is the inductive reactance
  • XC is the capacitive reactance
  • R is the resistance

Phase Angle Definition

A phase angle is an amount at which the voltage of a coil or circuit is leading or lagging behind the current of the same coil or circuit. This term is used most in electromagnetism.

Phase Angle Example

How to calculate a phase angle?

  1. First, determine the inductive reactance.

    Measure the inductive reactance of the circuit.

  2. Next, determine the capacitive reactance.

    Measure the capacitive reactance of the circuit.

  3. Next, determine the resistance.

    Measure the total resistance of the circuit.

  4. Finally, calculate the phase angle.

    Calculate the phase angle using the formula above.


What is a phase angle?

A phase angle is the leading or lagging amount that the voltage is moving through a circuit.

phase angle calculator
phase angle formula