Easily convert kVA to Watts (W) with our free online calculator. Learn the kVA to Watts formula, the role of Power Factor, and use our quick reference conversion table.
How to Convert kVA to Watts
To convert Kilovolt-Amps (kVA) to Watts (W), you need to multiply the apparent power by 1,000 to get Volt-Amps, and then multiply by the Power Factor (PF). This conversion is essential for understanding the actual working power available from a generator or transformer.
The Formula
The relationship between kVA and Watts is defined by the efficiency of the electrical load, represented by the Power Factor:
Watts = kVA × 1,000 × Power Factor (PF)
kVA to Watts Conversion Table
This reference table shows common kVA ratings converted to Watts using a standard 0.8 Power Factor:
| Apparent Power (kVA) | Real Power (Watts) @ 0.8 PF |
|---|---|
| 1 kVA | 800 W |
| 5 kVA | 4,000 W |
| 10 kVA | 8,000 W |
| 20 kVA | 16,000 W |
| 50 kVA | 40,000 W |
| 100 kVA | 80,000 W |
Contextual Information
What is the difference between kVA and Watts?
kVA (Kilovolt-Amps): This is “Apparent Power.” It is the total amount of power in a system, including both the power that performs work and the reactive power that maintains the electrical field in inductive loads (like motors).
Watts (W): This is “Real Power” or “Active Power.” It is the actual energy that is converted into heat, light, or mechanical motion.
The Role of Power Factor
The Power Factor is a decimal between 0 and 1. It tells you how much of the supplied power is actually doing work.
- A PF of 1.0 means all energy is being used for work (common in heaters or lightbulbs).
- A PF of 0.8 is the industry standard for industrial equipment and generators.
Why use this converter?
Most generators are sold based on their kVA rating. However, the appliances you want to run (like a microwave, air conditioner, or power tool) are rated in Watts. Using this converter ensures that your generator has enough active power capacity to handle the specific wattage load of your devices.