1. What is the Torque Formula?

The torque formula \( T = \frac{HP \times 5252}{RPM} \) calculates torque from horsepower and RPM. This equation is fundamental in mechanical engineering and automotive applications for determining the rotational force produced by an engine or motor.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (lb-ft)
• \( HP \) — Horsepower (hp)
• \( RPM \) — Revolutions per minute (rpm)
• 5252 — Conversion constant

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where horsepower and torque are equal at 5252 RPM in the English system of measurement.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for engine performance analysis, vehicle dynamics, mechanical design, and understanding the power characteristics of rotating machinery.

4. Using the Calculator

Tips: Enter horsepower in hp and RPM in revolutions per minute. All values must be valid (HP > 0, RPM > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 is the RPM at which horsepower and torque are numerically equal in the English measurement system, derived from the conversion between units of power and rotational force.

Q2: What are typical torque values for engines?
A: Torque values vary significantly based on engine type and size. Automotive engines typically produce 100-500 lb-ft of torque, while industrial engines can produce much higher values.

Q3: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery, including electric motors, though electric motors often have different torque characteristics than combustion engines.

Q4: How does torque relate to vehicle performance?
A: Torque determines a vehicle's acceleration and pulling power. Higher torque at lower RPM generally provides better low-speed acceleration and towing capability.

Q5: Are there metric versions of this formula?
A: Yes, in metric units the formula is \( T = \frac{P \times 9550}{N} \) where T is in Newton-meters, P is in kilowatts, and N is in RPM.