1. What is HP to kW Conversion?

Definition: This calculator converts mechanical horsepower (HP) to electrical kilowatts (kW) for electric motors.

Purpose: It helps engineers, electricians, and technicians determine the electrical power equivalent of motor horsepower ratings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts (kW)
• \( HP \) — Horsepower (mechanical)
• \( 0.746 \) — Conversion factor (1 HP = 746 watts)

Explanation: The horsepower value is multiplied by 0.746 to convert to kilowatts (1 kW = 1000 watts).

3. Importance of HP to kW Conversion

Details: Proper conversion ensures correct electrical system sizing, circuit protection, and energy efficiency calculations for motor-driven equipment.

4. Using the Calculator

Tips: Enter the motor horsepower rating. The value must be > 0. The result shows the equivalent power in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the exact conversion where 1 horsepower equals 745.7 watts (rounded to 746 watts or 0.746 kW).

Q2: Does this work for all types of horsepower?
A: This uses mechanical horsepower (1 HP = 550 ft-lb/s). Metric horsepower (PS) uses a slightly different conversion (1 PS = 0.7355 kW).

Q3: Is this the actual power consumption of the motor?
A: No, this is the mechanical output power. Actual electrical input power will be higher due to motor efficiency losses.

Q4: How accurate is this conversion?
A: The conversion is mathematically exact, but real-world motor performance may vary slightly.

Q5: Can I convert kW back to HP?
A: Yes, divide kW by 0.746 to get horsepower (HP = kW / 0.746).