Convert Reactive Power from Volt-Amperes Reactive to Kilovolt-Amperes Reactive (VAR to kVAR)

Volt-Ampere Reactive to Kilovolt-Ampere Reactive Conversion Formula

To convert reactive power from volt-amperes reactive (VAR) to kilovolt-amperes reactive (kVAR), divide by 1,000.

• kVAR = VAR ÷ 1,000

The kilo prefix means exactly one thousand, so the conversion is exact: multiply by 1,000 to go the other way. The unit itself measures reactive power — the portion of AC power that oscillates between source and load in inductors and capacitors without doing useful work, in contrast to real power (watts) and apparent power (VA).

Step-by-Step Example

A power analyzer on a motor feeder reads 2,500 VAR of inductive reactive power. Capacitor banks for power-factor correction are cataloged in kVAR:

1. Take the reading: 2,500 VAR
2. Divide by 1,000: 2,500 ÷ 1,000 = 2.5 kVAR

A 2.5 kVAR capacitor step would, in principle, cancel this demand and bring the feeder's power factor toward unity.

Quick Reference Table

Why This Conversion Comes Up in Real Work

Reactive power lives at two scales simultaneously. Measurements often arrive in plain VAR: power-quality analyzers, smart-meter registers and simulation outputs report raw values. Equipment and billing, on the other hand, speak kVAR: correction capacitors are sold in steps like 5, 12.5, 25 or 50 kVAR, utility tariffs charge for kVAR-hours or penalize demand above a power-factor threshold, and generator capability curves are drawn in kVAR or MVAR.

Sizing a correction bank is the classic use case: measure the plant's reactive demand (VAR), convert to kVAR, then pick standard capacitor steps that bring the power factor from, say, 0.78 to the 0.95 the tariff requires. A rule of thumb worth knowing while you do this: for each kW of load, raising power factor from 0.80 to 0.95 releases roughly 0.42 kVAR of correction demand — so a 100 kW plant typically needs a bank in the tens of kVAR, not hundreds.

How many volt-amperes reactive are in one kilovolt-ampere reactive? One Kilovolt-Ampere Reactive (kVAR) contains 1000 Volt-Amperes Reactive (VAR) — the inverse of the factor above. Multiplying by 0.001 takes you from volt-amperes reactive to kilovolt-amperes reactive; multiplying by 1000 brings you back.

Put in words: one volt-ampere reactive equals 0.001 kilovolt-amperes reactive, so the volt-ampere reactive is the smaller 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 a Volt-Ampere Reactive (VAR)?

A Volt-Ampere Reactive (VAR) is the unit used to measure reactive power in an electrical system.

Think of it as the "helper" power that supports the "real" power (Watts) in doing work.

How VARs Relate to Power Factor Correction

Volt-Ampere Reactive (VAR) is a crucial metric for optimizing a power system's power factor.

A high VAR reading signifies a large amount of reactive power, often leading to an inefficient power factor and higher energy costs.

By implementing power factor correction solutions, such as capacitor banks, businesses can effectively reduce their VAR demand.

This not only improves overall electrical efficiency and lowers utility bills but also frees up system capacity, allowing you to run more equipment without overloading your system.

This makes VAR management essential for any commercial or industrial facility looking to optimize efficiency and reduce costs.

VARs vs. Watts (W) vs. Volt-Amperes (VA): The Power Triangle Explained

In AC power systems, these three units are related and form the "power triangle":

• Watts (W): This is real power, or the "working" power. It's the power that performs the actual work, like lighting a bulb, heating an element, or spinning a motor.
• Volt-Ampere Reactive (VAR): This is reactive power. It doesn't do any useful work itself, but it's essential "support" power required to create magnetic fields for inductive loads like motors, transformers, and ballast.
• Volt-Amperes (VA): This is apparent power, which is the total power supplied by the utility (the combination of both Watts and VARs).

Understanding this relationship is essential for correctly sizing critical electrical infrastructure like generators, transformers, and uninterruptible power supplies (UPS).

The system must be able to supply both the real power (W) and the reactive power (VAR).

The Source and Impact of Reactive Power (VARs)

Reactive power, measured in VARs, is primarily produced by inductive loads connected to an electrical grid.

Common sources include electric motors, transformers, and industrial machinery, all of which require reactive power to establish their magnetic fields. While this power is necessary for the equipment to function, it does not contribute to useful work.

Excessive VARs on the system increase the total current flow. While necessary, too much reactive power is inefficient and can lead to problems like higher energy losses, voltage drops, and potential utility penalties, reducing the overall efficiency of your electrical network.

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.

Volt-Ampere Reactive to Kilovolt-Ampere Reactive Conversion Table

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

This conversion in other languages

Engineering datasheets across Europe write Volt-Ampere Reactive to Kilovolt-Ampere Reactive several different ways. The calculation is the same in every one of them.