1. What is HP to kW Conversion?

Definition: This calculator converts mechanical power in horsepower (HP) to electrical power in kilowatts (kW).

Purpose: It helps engineers, electricians, and technicians convert between these common power units used in different systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts (kW)
• \( HP \) — Power in horsepower
• 0.746 — Conversion factor (1 HP = 0.746 kW)

Explanation: The horsepower value is multiplied by 0.746 to get the equivalent power in kilowatts.

3. Importance of Power Unit Conversion

Details: Accurate conversion between HP and kW is essential for equipment specification, electrical system design, and energy efficiency calculations.

4. Using the Calculator

Tips: Simply enter the horsepower value (must be > 0) and the calculator will display 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 which equals approximately 745.7 watts (rounded to 0.746 kW).

Q2: Does this work for all types of horsepower?
A: This conversion applies to mechanical horsepower. Metric horsepower uses 0.7355 kW/HP.

Q3: When would I need this conversion?
A: When selecting motors, comparing engine power to electrical requirements, or working with mixed-unit specifications.

Q4: How precise is this conversion?
A: The 0.746 factor provides precision to 3 decimal places, sufficient for most engineering applications.

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