# The difference between kVA and kVAR

The difference between kVA and kVAR is pretty simple. “kVA” is the unit of apparent power whereas “kVAR” is the unit of reactive power. Before getting into the topic, we recommend you to understand apparent power and reactive power better, by reading this: Real, Reactive, Complex, and Apparent power. Now, let us compare both of them side-by-side to understand them better.

## Calculation of kVA

### Single-phase kVA

For single-phase, kVA can be calculated using the following formula.

kVA = (Voltage X Current)/1000

### Three-phase kVA

For three-phase, kVA can be calculated using the following formula.

Three-phase kVA if line to line voltage is known,

kVA = (√3 X Voltage X Current )/1000 = (1.732 X Voltage X Current)/1000

Three-phase kVA if phase to phase voltage is known,

kVA = (3 X Voltage X Current)/1000

## Calculation of kVA

### Single-phase kVA

For single-phase, kVA can be calculated using the following formula.

kVA = (Voltage X Current)/1000

### Three-phase kVA

For three-phase, kVA can be calculated using the following formula.

Three-phase kVA if line to line voltage is known,

kVA = (√3 X Voltage X Current )/1000 = (1.732 X Voltage X Current)/1000

Three-phase kVA if phase to phase voltage is known,

kVA = (3 X Voltage X Current)/1000

## Calculation of kVAR – True Power

### Single phase kVAR,

For single-phase, kVAR can be calculated using the following formula.

Single-phase – kVAR = (Voltage X Current X (1-Power factor))/1000

### Three-phase kilowatts

For three-phase, kVAR can be calculated using the following formula.

Three-phase kVAR if line to line voltage is known,

kW = (√3  X Voltage X Current X (1-Power factor))/1000

= (1.732 X Voltage X Current X (1-Power factor))/1000

Three-phase kVAR if phase to phase voltage is known,

kW = (3  X Voltage X Current X (1-Power factor))/1000