1. What is Horsepower to Watts Conversion?

Definition: This calculator converts power measurements from horsepower (hp) to watts (W).

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

2. How Does the Conversion Work?

The conversion uses the formula:

Where:

• \( P_w \) — Power in watts (W)
• \( P_{hp} \) — Power in horsepower (hp)

Explanation: 1 mechanical horsepower is equal to exactly 745.69987 watts, typically rounded to 746 watts for most practical calculations.

3. Importance of Power Unit Conversion

Details: Converting between horsepower and watts is essential when working with equipment specifications that use different measurement systems.

4. Using the Calculator

Tips: Enter the horsepower value (default is 1 hp) to get the equivalent power in watts. The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 746?
A: This comes from the original definition of horsepower (550 foot-pounds per second) converted to watts.

Q2: Are there different types of horsepower?
A: Yes, this calculator uses mechanical horsepower (745.7 W). Metric horsepower is 735.5 W, and electrical horsepower is 746 W.

Q3: When would I need this conversion?
A: When comparing engine power (often in hp) with electrical equipment ratings (typically in W), or working with international specifications.

Q4: How precise is the 746 conversion factor?
A: For most practical purposes, 746 is sufficiently precise. The exact value is 745.69987158227022 W.

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