Watts to kVA Calculator
Convert Real Power (Watts) to Apparent Power (kVA) using Power Factor. Essential for properly sizing generators and transformers.
Power Specs
Typical values: 1.0 for resistive loads (heaters, incandescent lights), 0.8 for inductive loads (motors, generators).
Apparent Power
Understanding Watts vs. kVA
When sizing generators or transformers, it's crucial to understand the difference between Real Power (Watts) and Apparent Power (kVA).
- Real Power (Watts or kW): The actual power consumed by the equipment to do useful work (like creating heat or motion).
- Apparent Power (VA or kVA): The total power supplied by the source (generator or transformer). It includes both Real Power and Reactive Power (power that oscillates back and forth in the circuit without doing useful work).
- Power Factor (PF): The ratio of Real Power to Apparent Power. It represents how efficiently the electrical power is being used.
Generators are typically rated in kVA (or kW at a specific Power Factor, usually 0.8). If you have a load of 5000 Watts with a Power Factor of 0.8, you need a generator capable of supplying 6.25 kVA.
Formulas Used:
Apparent Power (VA) = Real Power (Watts) / Power Factor
Apparent Power (kVA) = VA / 1000