1. What is an HP to Torque Calculator?

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

Purpose: It helps automotive engineers, mechanics, and enthusiasts understand the relationship between power and rotational force.

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, where torque and horsepower become equal at 5252 RPM.

3. Importance of Torque Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number in the formula?
A: It's the RPM where torque and horsepower values numerically equal each other due to the conversion between rotational speed and power.

Q2: What's more important - horsepower or torque?
A: Both matter. Horsepower determines top speed, while torque affects acceleration and pulling power.

Q3: Can I use this for electric motors?
A: Yes, the formula works for any rotating machinery, though electric motors often produce maximum torque at zero RPM.

Q4: How does gear ratio affect torque?
A: Gearing multiplies torque - lower gears increase available torque at the wheels while reducing speed.

Q5: What's typical torque for a passenger car?
A: Most passenger cars produce 100-300 lb-ft of torque, with diesel engines typically producing more torque at lower RPMs.