Input Parameters
About This Calculator
- Mechanical HP: 1 HP = 0.7457 kW
- Metric HP: 1 PS = 0.7355 kW
- Electrical HP: 1 HP = 0.746 kW
- Boiler HP: 1 HP = 9.8095 kW
How this HP to kW converter works
Horsepower and kilowatts are both power units. This converter supports four HP definitions:
- Mechanical HP (James Watt definition): 745.7W — used in US/UK
- Metric HP (PS): 735.5W — used in Europe, Japan, China
- Electrical HP: 746W — used for electric motors
- Boiler HP: 9,809.5W — used for steam boilers
Common motor HP to kW
0.5HP≈0.37kW, 1HP≈0.75kW, 2HP≈1.5kW, 5HP≈3.7kW, 10HP≈7.5kW, 25HP≈18.5kW, 50HP≈37kW, 100HP≈75kW, 200HP≈150kW.
FAQ
Is 1 HP equal to 0.75 kW?
Approximately yes. 1 mechanical HP = 0.7457 kW ≈ 0.75 kW. For metric HP, 1 PS = 0.7355 kW.
Why do motor nameplates show both HP and kW?
International motors follow IEC standards showing both. The kW value is the actual output power; HP is the traditional designation.
What is boiler horsepower?
1 boiler HP = 9,809.5W (≈9.81kW). It represents the power to evaporate 34.5 lb of water at 212°F per hour.