How it works
Convert power between watts, kilowatts, mechanical horsepower (hp), and metric horsepower (PS).
Enter an amount and choose the from and to units. The calculator converts using the exact definitions of each unit.
Formula
watts = amount × factor(from); result = watts ÷ factor(to). 1 hp = 745.6998715822702 W; 1 PS = 735.49875 W.
W- Watt (SI unit of power) (W)
hp- Mechanical / imperial horsepower (hp)
PS- Metric horsepower (PS)
Examples
- 100 kW to horsepowerAmount 100 · kW → hp≈ 134.10 hp
Frequently asked questions
What is the difference between hp and PS?
Both measure power but use slightly different definitions: 1 hp ≈ 745.7 W and 1 PS ≈ 735.5 W.
Is electric motor kW directly comparable?
Yes — watts and kilowatts are the SI units, and the conversion is exact.
How to read the result
The result is the same amount of power expressed in another unit.
Limitations
Power units only; no engine torque or RPM.
Source: Exact definitions: 1 hp = 745.6998715822702 W; 1 PS = 735.49875 W.