1. What is Torque to HP Conversion?

Definition: This calculator converts torque (rotational force) and RPM (revolutions per minute) to horsepower.

Purpose: It helps engineers, mechanics, and automotive enthusiasts understand the relationship between torque and horsepower in engines and motors.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower
• \( T \) — Torque in pound-feet (lb-ft)
• \( RPM \) — Rotational speed in revolutions per minute
• 5252 — Conversion constant (derived from the relationship between rotational and linear power)

Explanation: Horsepower is calculated by multiplying torque by RPM and dividing by the constant 5252.

3. Importance of Torque to HP Conversion

Details: Understanding this relationship helps in engine performance analysis, vehicle design, and comparing different power sources.

4. Using the Calculator

Tips: Enter the torque value in lb-ft and the rotational speed in RPM. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number?
A: It comes from the conversion between rotational and linear power (550 ft-lb/sec = 1 HP, and 2π radians per revolution).

Q2: At what RPM does torque equal horsepower?
A: At 5252 RPM, torque (in lb-ft) and horsepower will be numerically equal.

Q3: Can I use this for electric motors?
A: Yes, the formula works for any rotating machinery where you know torque and RPM.

Q4: What's the difference between torque and horsepower?
A: Torque measures rotational force, while horsepower measures the rate at which work is done (power).

Q5: How do I measure torque?
A: Torque is typically measured with a dynamometer, or you can find specifications from engine/motor manufacturers.