1. What is Torque?

Torque is a measure of the rotational force applied to an object. In mechanical engineering and automotive applications, torque represents the twisting force that causes rotation, measured in pound-feet (lb-ft) or Newton-meters (N·m).

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

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

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where 1 horsepower is defined as 550 foot-pounds per second and there are 5252 radians per minute in RPM.

3. Importance of Torque Calculation

Details: Torque calculation is essential for engine performance analysis, vehicle acceleration assessment, mechanical system design, and determining the pulling power of engines and motors in various applications.

4. Using the Calculator

Tips: Enter horsepower in hp and rotational speed in 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 (550 ft-lb/sec) and RPM, where 5252 = (550 × 60) ÷ (2 × π), accounting for the circular motion relationship.

Q2: What is the difference between torque and horsepower?
A: Torque measures rotational force, while horsepower measures the rate at which work is done. Horsepower = (Torque × RPM) ÷ 5252.

Q3: At what RPM does torque equal horsepower?
A: Torque and horsepower are numerically equal at 5252 RPM, as evident from the formula when T = HP.

Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery where horsepower and RPM are known, including electric motors, internal combustion engines, and turbines.

Q5: How does torque affect vehicle performance?
A: Higher torque at lower RPM provides better acceleration and towing capacity, while horsepower determines top speed and sustained performance.