1. What is a Motor Torque Calculator?

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

Purpose: It helps engineers, mechanics, and technicians understand motor performance characteristics for proper equipment selection and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The formula shows that torque is inversely proportional to RPM when horsepower is constant.

3. Importance of Torque Calculation

Details: Torque determines a motor's ability to perform work and is crucial for understanding starting power, acceleration, and load capacity.

4. Using the Calculator

Tips: Enter the motor's horsepower and its rotational speed in RPM. Both values must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 is the RPM at which horsepower and torque values are equal (when using lb-ft units), derived from the conversion between rotational and linear work.

Q2: What's the difference between torque and horsepower?
A: Torque measures rotational force, while horsepower measures work done over time (power). Horsepower = (Torque × RPM) / 5252.

Q3: How does torque affect vehicle performance?
A: Higher torque at lower RPMs provides better acceleration and towing capacity, while high-RPM horsepower affects top speed.

Q4: Can I calculate horsepower if I know torque and RPM?
A: Yes, use the formula: HP = (Torque × RPM) / 5252.

Q5: What's a typical torque value for car engines?
A: Most passenger cars produce 100-400 lb-ft of torque, with diesel engines typically producing higher torque at lower RPMs than gasoline engines.