Power Unit Converter (kW ↔ HP ↔ kVA)
CONVERT kW · HP · kVAConversion Formulas
1 kW ≈ 1.341 HP (Mechanical)
1 HP ≈ 0.746 kW
kVA = kW / cos φ
kW = kVA × cos φ
Kilowatts (kW) represent real power, while Kilolt-Amperes (kVA) represent apparent power. The relationship between them is determined by the Power Factor (cos φ), which typically ranges between 0.80 and 0.95 in industrial motor systems.
FAQ
What is the difference between kW and kVA?
kW (Kilowatts) is the real power that performs actual work (active power). kVA (Kilovolt-amperes) is the apparent power, which is the total power supplied to the circuit (including reactive power). kVA is used to size generators, transformers, and electrical cables.
What is Power Factor (cos φ)?
Power factor is the ratio of active power (kW) to apparent power (kVA). It represents how efficiently electrical power is converted into useful work. A power factor of 1.0 is ideal (purely resistive load), while industrial motors typically operate at 0.8 to 0.85.
Are there different types of Horsepower?
Yes. The two most common are Mechanical (Imperial) Horsepower (1 HP ≈ 0.7457 kW) used primarily in the US/UK, and Metric Horsepower (1 PS ≈ 0.7355 kW) used in Europe. This calculator uses standard Mechanical Horsepower (0.746 kW).