1. What is Power Output of a Motor?

Definition: This calculator converts motor power from horsepower (HP) to watts (W).

Purpose: It helps engineers, technicians, and hobbyists understand the equivalent power output in watts when given in horsepower.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Power output in watts
• \( HP \) — Horsepower

Explanation: Since 1 horsepower equals 746 watts, we multiply the horsepower value by 746 to get the equivalent power in watts.

3. Importance of Power Conversion

Details: Understanding power output in both HP and watts is crucial for motor selection, electrical system design, and energy efficiency calculations.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why 746 watts per horsepower?
A: This is the standard conversion factor established by James Watt's experiments with draft horses in the 18th century.

Q2: Is this for mechanical or electrical horsepower?
A: This calculator uses mechanical horsepower (745.7 W, rounded to 746 W). Metric horsepower (735.5 W) would use a different factor.

Q3: Can I convert watts back to horsepower?
A: Yes, divide watts by 746 to get horsepower.

Q4: Why is power sometimes expressed in HP and sometimes in watts?
A: HP is traditional for engines and motors, while watts are standard in electrical systems and international (SI) measurements.

Q5: Does this account for motor efficiency?
A: No, this is the theoretical power output. Actual power delivered would be less due to efficiency losses.