1. What is Torque Calculation from RPM and Power?

Definition: This calculator determines the torque produced by an engine or motor based on its horsepower and rotational speed (RPM).

Purpose: It helps engineers, mechanics, and automotive enthusiasts understand engine performance characteristics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute
• 5252 — Conversion constant (derived from the relationship between rotational speed and power)

Explanation: Torque is inversely proportional to RPM when horsepower remains constant. The 5252 constant comes from the conversion between rotational and linear power.

3. Importance of Torque Calculation

Details: Torque determines an engine's ability to perform work (acceleration, towing capacity, etc.). Understanding the torque curve helps in vehicle design and performance tuning.

4. Using the Calculator

Tips: Enter the horsepower and RPM values. Both must be greater than zero. The calculator will output torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 a special number in this formula?
A: 5252 RPM is the point where horsepower and torque (in lb-ft) are numerically equal in this equation due to unit conversion factors.

Q2: Can I use this for electric motors?
A: Yes, the formula works for any rotating machinery where you know the power and rotational speed.

Q3: What if my RPM is zero?
A: The formula is undefined at zero RPM. Engines produce torque only when rotating.

Q4: How does torque relate to vehicle performance?
A: Higher torque at lower RPMs generally means better acceleration and towing capability.

Q5: What's the difference between torque and horsepower?
A: Torque is a measure of rotational force, while horsepower is a measure of work done over time (power). Horsepower = (Torque × RPM) / 5252.