1. What is an Electric HP to kW Calculator?

Definition: This calculator converts mechanical horsepower (HP) to electrical kilowatts (kW) using the standard conversion factor.

Purpose: It helps engineers, electricians, and technicians convert between these common power units for equipment specifications and electrical system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts (kW)
• \( HP \) — Power in horsepower (HP)

Explanation: 1 mechanical horsepower is equivalent to approximately 0.746 kilowatts, which is the standard conversion factor.

3. Importance of Power Unit Conversion

Details: Accurate conversion between HP and kW is essential for proper motor sizing, electrical load calculations, and energy efficiency assessments.

4. Using the Calculator

Tips: Simply enter the horsepower value (must be > 0) and the calculator will instantly provide the equivalent power in kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the definition of 1 HP = 550 ft-lb/s and the conversion between mechanical and electrical power units.

Q2: Is this the same for all types of horsepower?
A: This applies to mechanical horsepower. Metric horsepower uses 0.7355 kW/HP.

Q3: When would I need this conversion?
A: When sizing electrical systems for motor loads, comparing equipment specifications, or calculating energy consumption.

Q4: How accurate is this conversion?
A: The 0.746 factor is standard, but actual motor efficiencies may vary based on design and operating conditions.

Q5: Can I convert kW back to HP?
A: Yes, simply divide kW by 0.746 to get HP (or use our kW to HP calculator).