VA to kW Calculator

Convert apparent power in volt-amperes (VA) to real power in kilowatts (kW).

Volt-Ampere to Kilowatt Converter

Common VA to kW Conversions

Click on these links to see instant conversions with common values:

Understanding VA to kW Conversion

Converting volt-amperes (VA) to kilowatts (kW) involves understanding the relationship between apparent power and real power, which is defined by the power factor.

Conversion Formula

kW = (VA × Power Factor (PF)) / 1000

Where:
• VA = Apparent Power in Volt-Amperes
• kW = Real Power in Kilowatts
• PF = Power Factor (a dimensionless number between 0 and 1)

Key Concepts

  • Volt-Ampere (VA): The unit of apparent power, which is the total power flowing in an AC circuit. It is the product of voltage and current.
  • Kilowatt (kW): The unit of real power, which is the actual power consumed or utilized by an electrical load.
  • Power Factor (PF): The ratio of real power to apparent power. It indicates how effectively electrical power is being converted into useful work output. A power factor closer to 1 (or 100%) means higher efficiency.

Typical Power Factor Values

Load Type Typical Power Factor (PF)
Resistive Loads (Heaters, Incandescent Lights)0.95 - 1.00
Inductive Loads (Motors, Transformers)0.60 - 0.90 (lagging)
Capacitive Loads (Capacitor Banks)0.95 - 1.00 (leading)
Computers, LED Lighting (with SMPS)0.85 - 0.95
Small Appliances0.70 - 0.90

Frequently Asked Questions

What is the difference between VA and kW?

VA (volt-amperes) is apparent power, the total power supplied to a circuit. kW (kilowatts) is real power, the power that actually does work. The difference is due to reactive power, which is present in AC circuits with inductive or capacitive loads.

Why is power factor important in VA to kW conversion?

The power factor accounts for the phase difference between voltage and current in AC circuits. A lower power factor means that a larger apparent power (VA) is needed to deliver the same amount of real power (kW), leading to inefficiencies and potentially higher electricity bills.

See Also