1. What is the Torque Formula?

The torque formula relates horsepower (HP) and RPM to calculate torque in pound-feet (lb-ft). The constant 5252 comes from the relationship between rotational speed and power.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Torque \) — Rotational force (lb-ft)
• \( HP \) — Horsepower (hp)
• \( RPM \) — Revolutions per minute (rev/min)
• \( 5252 \) — Conversion constant

Explanation: The formula shows that torque and horsepower are directly related at a given RPM. At 5252 RPM, torque and horsepower values are equal.

3. Importance of Torque Calculation

Details: Torque is crucial for understanding an engine's pulling power and acceleration capability. It's particularly important for applications like towing, hauling, and vehicle performance analysis.

4. Using the Calculator

Tips: Enter horsepower in hp and RPM in rev/min. Both values must be positive numbers. The calculator will compute the torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number in the formula?
A: 5252 comes from the conversion between rotational speed (RPM) and angular velocity (radians per second), where 1 hp = 550 ft-lb/sec.

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

Q3: At what RPM are torque and horsepower equal?
A: At 5252 RPM, torque (in lb-ft) and horsepower (in hp) have the same numerical value.

Q4: How does torque affect vehicle performance?
A: Higher torque at lower RPMs generally means better acceleration from a standstill and better towing capability.

Q5: 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 very different torque curves than combustion engines.