1. What is the Torque Formula?

The torque formula calculates torque from horsepower and RPM using the equation: T = (HP × 5252) / RPM. This formula is fundamental in mechanical engineering and automotive applications to determine 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
• \( RPM \) — Revolutions per minute

Explanation: The constant 5252 is derived from the relationship between horsepower, torque, and RPM, where horsepower and torque are equal at 5252 RPM in the imperial system.

3. Importance of Torque Calculation

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

4. Using the Calculator

Tips: Enter horsepower and RPM values. 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 torque, where 1 horsepower equals 550 foot-pounds per second, and there are 60 seconds in a minute and 2π radians per revolution.

Q2: What are typical torque values for automotive engines?
A: Typical passenger car engines produce 100-400 lb-ft of torque, while high-performance and diesel engines can produce significantly more.

Q3: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery, including electric motors, where horsepower and RPM are known.

Q4: How does torque relate to vehicle acceleration?
A: Torque directly affects a vehicle's acceleration capability, with higher torque generally providing better acceleration, particularly at lower RPMs.

Q5: Are there different units for torque measurement?
A: Yes, torque can be measured in Newton-meters (Nm) in the metric system. The conversion factor is 1 lb-ft = 1.35582 Nm.