1. What is the Torque Formula with Power?

Definition: This calculator computes the torque produced by a rotating system based on its power output and rotational speed.

Purpose: It helps engineers and technicians determine the torque requirements or output in mechanical systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( P_w \) — Power (watts)
• \( RPM \) — Rotational speed (revolutions per minute)

Explanation: The formula converts power (energy per unit time) to torque (rotational force) considering the rotational speed.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for designing mechanical systems, selecting motors, and ensuring proper operation of rotating equipment.

4. Using the Calculator

Tips: Enter the power in watts and rotational speed in RPM. Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 60 in the numerator?
A: The factor of 60 converts power in watts (joules/second) to account for the minute-based RPM unit.

Q2: What units does this formula use?
A: This version uses watts for power and RPM for speed to yield torque in pound-feet (lb-ft).

Q3: Can I use horsepower instead of watts?
A: Yes, but you would need to convert horsepower to watts (1 HP = 745.7 watts) first.

Q4: Does this work for both motors and engines?
A: Yes, the formula applies to any rotating system where you know the power and speed.

Q5: How does torque relate to power?
A: Power is the rate of doing work, while torque is the rotational force. Higher torque at the same RPM means more power.