Convert Reactive Power from Kilovolt-Amperes Reactive to Millivolt-Amperes Reactive (kVAR to mVAR)

Kilovolt-Ampere Reactive to Millivolt-Ampere Reactive Conversion Formula

Example

Let's convert 5 Kilovolt-Ampere Reactive (kVAR) to Millivolt-Ampere Reactive (mVAR).

Using the formula:

Therefore, 5 Kilovolt-Ampere Reactive (kVAR) is equal to 5000000 Millivolt-Ampere Reactive (mVAR).

How many kilovolt-amperes reactive are in one millivolt-ampere reactive? One Millivolt-Ampere Reactive (mVAR) contains 10^-6 Kilovolt-Amperes Reactive (kVAR) — the inverse of the factor above. Multiplying by 10⁶ takes you from kilovolt-amperes reactive to millivolt-amperes reactive; multiplying by 10^-6 brings you back.

Put in words: one kilovolt-ampere reactive equals 10⁶ millivolt-amperes reactive, so the kilovolt-ampere reactive is the larger unit of this pair. Converting between them never changes the amount of reactive power being measured — only the size of the unit you count it in.

What is kVAR (Kilovolt-Ampere Reactive)?

A Kilovolt-Ampere Reactive (kVAR) is a unit used to measure reactive power in an electrical system.

One kVAR is equal to one thousand volt-amperes reactive (VAR). Think of it as the counterpart to a kilowatt (kW), which measures real power (also known as "working power").

Why Do We Measure "Non-Working" Power?

kVAR measures reactive power, often called "non-working" power or "wattless" power.

While it doesn't perform actual work (like lighting a bulb), it's essential for equipment that uses magnetic fields to operate. This includes common industrial and commercial items like:

• Motors
• Transformers
• Fluorescent light ballasts

This power is "reactive" because it just moves back and forth (oscillates) between the power source and the load. This extra movement increases the total current in the wires, which can put a strain on the entire electrical system.

kVAR and Power Factor: What's the Connection?

A high amount of kVAR is the primary cause of a poor power factor.

Power factor is a critical measure of your electrical efficiency, on a scale from 0 to 1. A low power factor score means your system is using energy inefficiently.

To fix this, buildings install power factor correction (PFC) systems, which are usually capacitor banks. These banks supply the needed reactive power directly to the equipment.

This process "cancels out" the reactive power that would otherwise be pulled from the utility grid, which provides several key benefits:

• Reduces the net kVAR demand
• Lowers demand on the power grid
• Helps avoid costly penalty fees from the utility company

Why Is High kVAR a Problem?

Excessive kVAR is bad for both your system's health and your wallet. Because it increases the total current flowing through your wiring, high kVAR leads to several significant problems:

• Wasted Energy: More current creates more heat in wires and transformers, which is simply lost energy.
• Voltage Drops: Equipment may not get the stable voltage it needs to run properly, leading to poor performance and a shorter lifespan.
• Reduced System Capacity: Your electrical system's wiring gets "clogged" with reactive power, leaving less capacity for the useful power you actually need to run your operations.

To cover the costs of this strain on the grid, utility companies often charge demand fees or power factor penalties, especially for commercial and industrial customers.

What is a Millivolt-Ampere Reactive (mVAR)?

A Millivolt-Ampere Reactive (mVAR) is a small unit used to measure reactive power.

Think of reactive power as the "helper" power in an electrical circuit. It doesn't do the actual work (like lighting a bulb), but it's essential for components like motors and transformers to function.

An mVAR is tiny: it's equal to one-thousandth of a single Volt-Ampere Reactive (VAR).

Why Does mVAR Matter for Your Power Factor?

In an AC circuit, you have two types of power. Real power (measured in milliwatts, mW) does the actual work, like spinning a motor. Reactive power (measured in mVAR) is the "non-working" power that builds magnetic and electric fields to help the motor spin.

The problem is that too much reactive power leads to a poor power factor. This is a sign of inefficiency—it means your system is drawing more total power than it's actually using for work.

Managing reactive power, even at the small mVAR scale, is key to improving energy efficiency and keeping voltage levels stable in sensitive electronics.

How mVAR Fits into the Power Triangle

The power triangle is a simple diagram that shows how these three types of power relate. Imagine a right-angle triangle:

• Real Power (mW): The base of the triangle (the "work-doer").
• Reactive Power (mVAR): The vertical side (the "helper").
• Apparent Power (mVA): The longest side, or hypotenuse (the "total power" supplied).

This relationship is shown by the formula (mVA)² = (mW)² + (mVAR)².

For engineers, the goal is to make the reactive power (mVAR) side as small as possible. This makes the total power (mVA) and the real power (mW) almost equal, which means the circuit is very efficient.

Where Is mVAR Used in Practical Applications?

You won't hear about mVAR when discussing a city's power grid (they use much larger units like kVAR or MVAR).

Instead, the Millivolt-Ampere Reactive is crucial for low-power electronics.

Engineers use mVAR measurements in labs when designing or testing individual components like:

• Capacitors
• Inductors
• Integrated circuits

Precise mVAR readings help them understand the "reactive properties" of these tiny parts, ensuring that a final product (like your smartphone or computer) runs as efficiently as possible.

Kilovolt-Ampere Reactive to Millivolt-Ampere Reactive Conversion Table

Here are some quick reference conversions from Kilovolt-Ampere Reactive (kVAR) to Millivolt-Ampere Reactive (mVAR):