1. What is the Torque Formula?

The torque formula calculates rotational force from horsepower and RPM. This relationship is fundamental in mechanical engineering and automotive applications to understand engine performance characteristics.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (lb-ft)
• \( HP \) — Horsepower (hp)
• \( RPM \) — Rotations per minute (rpm)

Explanation: The constant 5252 is derived from the relationship between rotational power and torque, where 1 horsepower is defined as 550 foot-pounds per second.

3. Importance of Torque Calculation

Details: Torque measurement is essential for evaluating engine performance, transmission design, and understanding vehicle acceleration characteristics. Higher torque at lower RPM typically indicates better low-end power.

4. Using the Calculator

Tips: Enter horsepower in hp and RPM in rotations per minute. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 is the constant that results from the conversion between rotational power units (RPM) and linear power units (horsepower), where 1 hp = 550 ft-lb/sec.

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

Q3: At what RPM are torque and horsepower equal?
A: Torque and horsepower values are equal at 5252 RPM, which is why this number appears in the formula.

Q4: Can I use this formula for electric motors?
A: Yes, the formula works for any rotational power system, though electric motors often have different torque curves than combustion engines.

Q5: How does gear ratio affect torque?
A: Gear reduction multiplies torque while reducing RPM, which is why lower gears provide more pulling power but less speed.