1. What is Torque to Horsepower Conversion?

Definition: This calculator converts torque in pound-feet (lb-ft) to horsepower (HP) using the rotational speed (RPM).

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 HP, torque, and RPM)

Explanation: Horsepower is calculated by multiplying torque by RPM and dividing by 5252, which is the RPM where torque and horsepower values cross on dyno charts.

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 equation (33,000 ft-lb/min)/2π radians, which is the conversion between rotational work and linear work.

Q2: At what RPM do torque and HP cross?
A: They always cross at 5252 RPM because of the constant in the formula.

Q3: Can I use this for electric motors?
A: Yes, the formula works for any rotating machinery.

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

Q5: How accurate is this calculation?
A: It's mathematically precise, but real-world factors like drivetrain loss may affect actual output.