1. What is Horsepower (HP) Calculation?

Definition: This calculator computes mechanical horsepower from torque and rotational speed (RPM).

Purpose: It helps engineers, mechanics, and automotive enthusiasts determine engine power output.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower
• \( T \) — Torque (pound-feet)
• \( RPM \) — Rotations per minute
• 5252 — Conversion constant (derived from units)

Explanation: The formula shows the direct relationship between torque and horsepower at a given rotational speed.

3. Importance of HP Calculation

Details: Horsepower measurement is crucial for engine performance analysis, vehicle design, and mechanical system evaluation.

4. Using the Calculator

Tips: Enter torque in pound-feet and RPM value. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number?
A: It's the conversion constant when using lb-ft for torque and RPM for speed (derived from 33,000 ft-lb/min per horsepower).

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

Q3: Can I use metric units?
A: No, this formula requires imperial units (lb-ft and RPM). For metric (Nm), use different conversion.

Q4: What's typical torque for a car engine?
A: Passenger cars typically have 100-300 lb-ft, while trucks may have 400-1000+ lb-ft.

Q5: Does this work for electric motors?
A: Yes, the formula applies to any rotational power source, including electric motors.