1. What is Torque from Motor HP Calculator?

Definition: This calculator estimates the torque produced by a motor based on its horsepower and rotational speed (RPM).

Purpose: It helps engineers and technicians determine the twisting force a motor can generate at a given speed.

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 HP, torque, and RPM)

Explanation: Torque is inversely proportional to RPM when horsepower remains constant. The constant 5252 comes from the fact that 1 HP equals 550 foot-pounds per second.

3. Importance of Torque Calculation

Details: Understanding torque is crucial for selecting motors, designing mechanical systems, and ensuring proper power transmission in machinery.

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 the magic number in the formula?
A: It comes from unit conversions - 1 HP = 550 ft-lb/sec and there are 60 seconds in a minute. 550 × 60 / 2π ≈ 5252.

Q2: At what RPM does HP equal torque in value?
A: At 5252 RPM, the numerical values of HP and torque (in lb-ft) are equal.

Q3: Does this work for electric and combustion engines?
A: Yes, the formula applies to any rotating machinery where HP and RPM are known.

Q4: How does torque relate to vehicle performance?
A: Torque determines acceleration force, while HP determines top speed potential. High torque at low RPM is good for towing.

Q5: Can I calculate HP if I know torque and RPM?
A: Yes, use the rearranged formula: HP = (Torque × RPM) / 5252.