kW to HP Converter
Electric motor and engine power conversion tool.
How to convert kW to HP?
In the industrial world, power is measured in two main units: Kilowatts (kW), the standard unit in the International System (SI), and Horsepower (HP), commonly used in the US and for rating mechanical engines and electric motors.
1 kW = 1.341022 HP (Mechanical)
1 HP = 0.745699 kW
Common Motor Power Table
| Motor Power (kW) | Horsepower (HP) - Approx | Typical Application |
|---|---|---|
| 0.75 kW | 1.0 HP | Small water pumps / fans |
| 1.5 kW | 2.0 HP | Conveyor belts / mixers |
| 3.7 kW | 5.0 HP | Industrial air compressors |
| 7.5 kW | 10.0 HP | Hydraulic power units |
| 15 kW | 20.0 HP | Large ventilation systems |
| 75 kW | 100 HP | Main plant utility pumps |
Power Units in Engineering
Why this conversion is vital for your facility:
- Motor Sizing: When replacing an old American motor (rated in HP) with a modern European one (rated in kW), exact matching is required to ensure the mechanical load is handled safely.
- VFD Configuration: Variable Frequency Drives often require the motor nameplate power to be entered. If the drive is programmed in kW but your motor is HP, accurate conversion avoids tripping.
- Efficiency Analysis: Calculating the electrical input vs. mechanical output often requires switching between these units to determine the overall system efficiency.
FAQ: Power & Horsepower
Is there a difference between HP and CV?
Yes. HP (Horsepower) is the mechanical/imperial unit (0.7457 kW), while CV (Caballo de Vapor) is the metric horsepower (0.7355 kW). This tool uses the standard Mechanical HP used in the US.
How many kW is a 1 HP motor?
A standard 1 HP electric motor consumes approximately 0.746 kilowatts of power at 100% efficiency.