1. What is HP to Watts Conversion?

Definition: This calculator converts mechanical power in horsepower (HP) to electrical power in watts (W).

Purpose: It helps engineers, electricians, and technicians compare mechanical and electrical power systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Power in watts (W)
• \( HP \) — Power in horsepower (HP)

Explanation: 1 mechanical horsepower is equivalent to exactly 745.69987 watts (typically rounded to 746 watts for practical calculations).

3. Importance of Power Conversion

Details: Accurate conversion between units is essential for system design, equipment selection, and energy efficiency calculations.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why 746 watts per horsepower?
A: This value comes from James Watt's original definition of horsepower based on the work a horse could do turning a mill wheel.

Q2: Is this the same for all types of horsepower?
A: This calculator uses mechanical horsepower. Metric horsepower (PS) uses 735.5 watts, and boiler horsepower uses 9809.5 watts.

Q3: How precise is this conversion?
A: The 746 factor is rounded from 745.69987 watts, giving about 0.04% error - negligible for most practical applications.

Q4: When would I need this conversion?
A: When sizing electrical systems to match mechanical power requirements, or comparing engine output to electrical motor ratings.

Q5: Can I convert watts back to horsepower?
A: Yes, simply divide watts by 746 to get horsepower (HP = W / 746).