1. What is 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 the power output of engines, motors, and rotating machinery.

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 converts torque and rotational speed into mechanical power by accounting for the angular velocity.

3. Importance of Power Calculation

Details: Understanding power output is crucial for designing mechanical systems, selecting appropriate motors, and evaluating performance.

4. Using the Calculator

Tips: Enter the torque in pound-feet and RPM values. 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, and outputs power in watts and horsepower.

Q2: Can I use Newton-meters for torque?
A: This calculator uses lb-ft. For Nm, use 1 Nm = 0.737562 lb-ft conversion first.

Q3: Why show both watts and horsepower?
A: Watts is the SI unit, while horsepower is commonly used in automotive and mechanical applications.

Q4: Does this account for efficiency losses?
A: No, this calculates theoretical power. Actual power may be lower due to friction and other losses.

Q5: What's the relationship between torque and power?
A: Power is the rate of doing work, while torque is rotational force. Power = Torque × Angular Velocity.