1. What is Torque RPM to Power Calculator?

Definition: This calculator converts torque and rotational speed (RPM) to mechanical power in watts and horsepower.

Purpose: It helps engineers, mechanics, and technicians determine the power output of rotating machinery like engines, motors, and turbines.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula calculates the instantaneous power being transmitted by a rotating shaft based on its torque and speed.

3. Importance of Power Calculation

Details: Accurate power calculation is essential for designing mechanical systems, selecting appropriate motors, and evaluating performance.

4. Using the Calculator

Tips: Enter the torque in pound-feet and RPM. The calculator provides results in both watts and horsepower for convenience.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for torque?
A: This calculator uses pound-feet (lb-ft). For Newton-meters, use 1 Nm = 0.7376 lb-ft.

Q2: How accurate is this calculation?
A: The calculation is mathematically precise for steady-state conditions but doesn't account for efficiency losses.

Q3: Why two power results?
A: Watts are SI units while horsepower is commonly used in mechanical/automotive applications (1 hp = 745.7 watts).

Q4: Can I use this for electric motors?
A: Yes, but remember motor ratings typically show output power after efficiency losses.

Q5: What if my torque varies with RPM?
A: This gives instantaneous power. For variable torque, you'd need to integrate over the RPM range.