Reactive Energy Converter

The Reactive Energy Converter is a free online tool that converts reactive energy between volt-ampere-reactive-hours (VArh), kilovolt-ampere-reactive-hours (kVArh), and megavolt-ampere-reactive-hours (MVArh) instantly. No sign-up needed — enter a value, choose your units, and get an accurate result. It's a useful reference for facility managers and electrical engineers reviewing commercial or industrial power bills.

What is reactive energy?

Reactive energy is the energy stored and released by inductive and capacitive loads in AC electrical systems, rather than energy that performs useful work. Utility companies often track reactive energy in kVArh on industrial and commercial electricity bills, since excessive reactive power can trigger penalty charges — making accurate unit conversion useful for billing checks and power factor correction. Reducing reactive energy consumption not only avoids penalty charges but can also improve overall system efficiency.

How to use the Reactive Energy Converter

1. Enter the reactive energy value you want to convert.
2. Select the unit to convert from — VArh, kVArh, or MVArh.
3. Click Calculate to see the equivalent across units.

Key features

• Supports VArh, kVArh and MVArh with precise scaling.
• Useful for electrical billing checks and power factor analysis.
• Instant, accurate two-way conversion.
• Free and works directly in your browser.

Related tools

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

Frequently asked questions

Is the Reactive Energy Converter free?

Yes, it's completely free with no sign-up required. There's no limit on how many values you can convert for billing or engineering reviews.

How do I convert VArh to kVArh?

Divide the value in VArh by 1,000 to get kVArh, and divide by 1,000,000 for MVArh. The same thousand-fold scaling pattern applies consistently across all reactive energy units.

Why do utility bills include reactive energy?

Businesses with large motors or inductive equipment often generate significant reactive energy, and utilities may charge extra for it since it adds load without doing useful work. Reviewing these charges regularly can help facilities identify equipment that's dragging down their power factor.

How can reactive energy be reduced?

Power factor correction equipment, like capacitor banks, is commonly used in industrial settings to reduce reactive energy and avoid penalty charges. Many utilities offer reduced rates or incentives to businesses that keep their power factor within an acceptable range.