1. What is Torque Calculation?

The torque calculation formula T = (P × 5252) / RPM is used to determine the rotational force produced by an engine or motor. This formula converts horsepower to torque, providing a crucial measurement for mechanical engineering and automotive applications.

2. How Does the Calculator Work?

The calculator uses the torque calculation formula:

Where:

• \( T \) — Torque (lb-ft)
• \( P \) — Power (HP)
• \( 5252 \) — Conversion constant
• \( RPM \) — Rotational speed (rev/min)

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where 1 horsepower equals 550 foot-pounds per second and there are 60 seconds in a minute.

3. Importance of Torque Calculation

Details: Torque calculation is essential for engine performance analysis, gearbox design, vehicle dynamics, and mechanical system optimization. It helps engineers understand the twisting force available at different engine speeds.

4. Using the Calculator

Tips: Enter power in horsepower (HP) and rotational speed in revolutions per minute (RPM). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between horsepower and foot-pounds per minute, where 1 HP = 33,000 ft-lb/min and 33,000 ÷ (2π) ≈ 5252.

Q2: What is the relationship between torque and horsepower?
A: Horsepower is a measure of work done over time, while torque is a measure of rotational force. Horsepower = (Torque × RPM) ÷ 5252.

Q3: At what RPM is torque equal to horsepower?
A: Torque equals horsepower at exactly 5252 RPM, as the formula becomes T = (T × 5252) ÷ 5252.

Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery where power is measured in horsepower and speed in RPM.

Q5: What are typical torque values for different engines?
A: Typical values range from 100-200 lb-ft for small car engines to over 1,000 lb-ft for large diesel engines and industrial motors.