Motor Horsepower (HP) to Kilowatt (kW) Calculator
Convert motor horsepower to kilowatts for efficient power analysis.
Motor HP to kW Calculator
Accurate conversion for motor power ratings
Results:
Kilowatts (kW): 0.00
How to Use the Motor HP to kW Calculator
Motor HP to kW Conversion
- Enter the motor's Horsepower (HP).
- Input the motor's efficiency in percentage (e.g., 85 for 85%).
- Provide the power factor (PF) of the motor (typically between 0.7 and 0.95).
- Click 'Calculate' to get the equivalent electrical input power in kilowatts.
Motor Power Conversion Fundamentals
HP to kW Conversion
Horsepower (HP) is a unit of mechanical power, while Kilowatt (kW) is the standard international unit of electrical power. Converting from mechanical HP output to electrical kW input requires accounting for the motor's efficiency.
- 1 HP is approximately equal to 0.7457 kW.
- Motor efficiency accounts for power losses during conversion.
Efficiency & Power Factor
- Efficiency: Represents how effectively a motor converts electrical input power into mechanical output power. It's expressed as a percentage.
- Power Factor (PF): Applies to AC circuits and describes the phase difference between voltage and current. While crucial for electrical system design (e.g., calculating current or kVA), it does not directly factor into the conversion of mechanical HP to electrical real power (kW) input, which is primarily governed by efficiency.
Key Formula:
Electrical Input kW = (HP × 0.7457) / (Efficiency / 100)
Calculation Formulas
Electrical Input Kilowatts (kW):
kW = (HP × 0.7457) / (Efficiency / 100)
Example Calculation
For a 10 HP motor with 85% efficiency:
Horsepower (HP): 10
Efficiency: 85% (0.85 as decimal)
kW = (10 × 0.7457) / 0.85
kW = 7.457 / 0.85
kW = 8.77 kW
Kilowatts = 8.77 kW
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