Enter the true power and the apparent power into the calculator to determine the reactive power.

## Reactive Power Formula

The following formula is used to calculate an reactive power value.

RP = SQRT ( AP^2 – TP^2)

- Where RP is the reactive power
- AP is the apparent power
- TP is the true power.

## FAQ

**What is reactive power?**

A reactive power is the total power, known as volts times amperes, that are out-of-phase with each other. It’s the portion of electricity that sustains the electric and magnetic fields needed for alternating current equipment.

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