1. What is Horsepower to kW Conversion?

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

Purpose: It helps engineers, mechanics, and technicians convert between these common power units used in automotive, industrial, and electrical applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Power in kilowatts
• \( HP \) — 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: Converting between HP and kW is essential when working with equipment specifications that use different measurement systems, or when comparing engine/motor performance.

4. Using the Calculator

Tips: Enter the horsepower value (must be > 0) and the calculator will automatically compute the equivalent kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 0.746?
A: This comes from the definition of 1 horsepower = 550 foot-pounds per second, which equals approximately 745.7 watts (0.7457 kW).

Q2: Is this conversion exact?
A: The conversion is based on the mechanical horsepower definition. Other horsepower types (metric, boiler) use slightly different conversion factors.

Q3: When would I need this conversion?
A: Common uses include comparing engine power ratings, sizing electrical systems for motors, or converting specifications between metric and imperial systems.

Q4: How accurate is this conversion?
A: For most practical purposes, 0.746 provides sufficient accuracy. For precise calculations, use 0.745699872.

Q5: Can I convert kW back to HP?
A: Yes, simply divide the kW value by 0.746 (or multiply by 1.341) to get horsepower.