1. What is the Torque to HP Formula?

The torque to horsepower formula relates rotational force (torque) and speed (RPM) to power output. It's fundamental in automotive and mechanical engineering to understand engine performance.

2. How Does the Calculator Work?

The calculator uses the torque to HP equation:

Where:

• \( Torque \) — Rotational force in pound-feet (lb-ft)
• \( RPM \) — Rotational speed in revolutions per minute
• 5252 — Conversion constant (derived from the relationship between radians and horsepower)

Explanation: At 5252 RPM, torque and horsepower values are always equal. Below this RPM, torque is higher than HP; above it, HP exceeds torque.

3. Importance of Torque and HP Calculation

Details: Understanding the relationship between torque and horsepower helps in engine tuning, vehicle performance analysis, and mechanical system design.

4. Using the Calculator

Tips: Enter torque in lb-ft and RPM values. Both must be positive numbers. The calculator will instantly compute the horsepower.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 RPM special in torque/HP calculations?
A: At 5252 RPM, the HP and torque values intersect because of the mathematical relationship between rotational force and power.

Q2: What's the difference between torque and horsepower?
A: Torque measures rotational force, while horsepower measures the rate at which work is done (power).

Q3: Can I use this for electric motors?
A: Yes, the formula works for any rotational power system, including electric motors.

Q4: How does gearing affect torque and HP?
A: Gearing changes torque at the wheels but doesn't affect the engine's actual HP output.

Q5: What are typical torque values for cars?
A: Passenger cars typically have 100-300 lb-ft, while performance vehicles can exceed 500 lb-ft.