1. What is Motor Power Calculation from Torque and RPM?

Definition: This calculator determines the mechanical power output of a motor based on its torque and rotational speed.

Purpose: It helps engineers and technicians evaluate motor performance and select appropriate motors for mechanical systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_w \) — Power in watts
• \( T \) — Torque in pound-feet (lb-ft)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 2\pi \) — Conversion factor for radians per revolution
• \( 60 \) — Conversion factor for seconds per minute

Explanation: The formula converts rotational mechanical power (torque × angular velocity) into watts.

3. Importance of Motor Power Calculation

Details: Accurate power calculation ensures proper motor sizing, energy efficiency, and system reliability.

4. Using the Calculator

Tips: Enter the torque in lb-ft and rotational speed in RPM. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units does this calculator use?
A: Torque in pound-feet (lb-ft), RPM in revolutions per minute, with results in watts and horsepower.

Q2: How do I convert the result to horsepower?
A: 1 horsepower = 745.7 watts. The calculator shows both watt and HP results.

Q3: Can I use this for electric motors and engines?
A: Yes, this calculation works for any rotational power source.

Q4: What's a typical torque value for small motors?
A: Small electric motors might produce 1-5 lb-ft, while larger industrial motors can produce hundreds of lb-ft.

Q5: Does this account for motor efficiency?
A: No, this calculates mechanical output power. Electrical input power would be higher due to efficiency losses.