1. What is the HP to Torque Formula?

Definition: This calculator converts horsepower (HP) to torque (lb-ft) using engine RPM.

Purpose: It helps automotive engineers, mechanics, and enthusiasts understand engine performance characteristics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute

Explanation: The constant 5252 comes from the relationship between rotational speed and power (1 HP = 550 ft-lb/sec).

3. Importance of Torque Calculation

Details: Torque measures rotational force and is crucial for understanding acceleration, towing capacity, and engine efficiency.

4. Using the Calculator

Tips: Enter the horsepower value and engine RPM. Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number?
A: It's the RPM where horsepower and torque values intersect (cross on dyno charts) due to unit conversion factors.

Q2: What's more important - HP or torque?
A: Both matter - torque determines pulling power, while HP determines how fast work can be done.

Q3: Can I use this for electric motors?
A: Yes, but electric motors often have different torque curves than combustion engines.

Q4: What's typical torque for a car engine?
A: Passenger cars might have 100-300 lb-ft, while trucks can exceed 500 lb-ft.

Q5: How does gearing affect torque?
A: Gearing multiplies torque at the wheels, but the engine's torque output remains the same.