1. What is a Power from Torque and RPM Calculator?

Definition: This calculator computes mechanical power output based on torque and rotational speed (RPM).

Purpose: It helps engineers, mechanics, and technicians determine power output in various mechanical systems.

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)

Explanation: The formula converts torque and rotational speed to power by accounting for the angular velocity (2π radians per revolution) and converting minutes to seconds (60 seconds per minute).

3. Importance of Power Calculation

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

4. Using the Calculator

Tips: Enter the torque in pound-feet and RPM values. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Can I use different torque units?
A: The calculator uses lb-ft. For Nm, multiply by 1.355818 before entering the value.

Q2: How do I convert the result to horsepower?
A: Divide the wattage result by 745.7 to get horsepower.

Q3: Does this work for electric motors?
A: Yes, this calculates mechanical power output regardless of power source.

Q4: What's the relationship between torque and power?
A: Power is the product of torque and angular velocity (RPM).

Q5: Why is 2π in the formula?
A: This converts revolutions to radians (1 revolution = 2π radians).