1. What is the Torque Formula?

The torque formula calculates rotational force from horsepower and rotational speed. It is fundamental in mechanical engineering and automotive applications for understanding engine performance and power transmission capabilities.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

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

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and rotational speed, where one horsepower equals 550 foot-pounds per second and there are 60 seconds in a minute.

3. Importance of Torque Calculation

Details: Torque calculation is essential for engine design, vehicle performance analysis, gear selection, and understanding the relationship between power and rotational force in mechanical systems.

4. Using the Calculator

Tips: Enter horsepower and RPM values. 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 used in the formula?
A: 5252 is a constant derived from the conversion between horsepower and torque, where 1 HP = 550 ft-lb/sec and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).

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

Q3: What are typical torque values for engines?
A: Typical passenger car engines produce 100-400 lb-ft of torque, while heavy-duty diesel engines can produce over 1000 lb-ft.

Q4: 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.

Q5: How does torque affect vehicle performance?
A: Higher torque provides better acceleration and towing capacity, while horsepower determines top speed and overall power output.