Reactive power is denoted by letter "Q".

**Q = I ^{2}X**

The unit of reactive power is Volt-Ampere-reactive (VAR).

The formula for reactive power is,

Reactive power = VI sin (phi)

The unit of reactive power is VAR ( Volt ampere reactive). The reactive power is denoted by 'Q'.

The formula for real power is,

Real power = VI cos (phi)

The unit of real power is watts. The real power is denoted by 'P'.