Reactive Power Converter

The Reactive Power Converter is a free online tool that converts reactive power between volt-amperes-reactive (VAR), kilovolt-amperes-reactive (kVAR), and megavolt-amperes-reactive (MVAR) instantly. No sign-up required — enter a value, choose your units, and get an accurate result.

What is reactive power?

Reactive power is the portion of electrical power in an AC circuit that oscillates between the source and inductive or capacitive loads without performing useful work. It's essential for maintaining voltage levels in power systems, and engineers regularly convert between VAR, kVAR and MVAR when sizing capacitor banks or analyzing power factor.

How to use the Reactive Power Converter

1. Enter the reactive power value you want to convert.
2. Select the unit to convert from — VAR, kVAR, or MVAR.
3. Click Calculate to see the equivalent across units.

Key features

• Supports VAR, kVAR and MVAR with precise scaling.
• Useful for power factor correction and electrical system design.
• Instant, accurate two-way conversion.
• Free and works directly in your browser.

Related tools

Also working with electrical units? Try the Apparent Power Converter, Power Converter, or the Voltage Converter.

Frequently asked questions

Is the Reactive Power Converter free?

Yes, completely free with no sign-up or usage limits.

How is reactive power different from real power?

Real power (watts) performs useful work, while reactive power (VAR) supports voltage but doesn't do work directly — both combine to form apparent power.

How do I convert VAR to kVAR?

Divide the value in VAR by 1,000 to get kVAR, and by 1,000,000 for MVAR.

Why does reactive power matter for engineers?

Too much reactive power can reduce system efficiency and voltage stability, so engineers monitor and correct it using capacitors or reactors.