1. What is a Torque from HP Calculator?

Definition: This calculator estimates the torque output based on horsepower and RPM (revolutions per minute).

Purpose: It helps engineers, mechanics, and automotive enthusiasts determine the torque produced by an engine at a specific RPM.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute
• 5252 — Constant derived from the relationship between HP, torque, and RPM

Explanation: The formula shows that torque and horsepower are directly related through RPM, with the constant 5252 coming from unit conversions (33,000 ft-lb/min per HP divided by 2π radians per revolution).

3. Importance of Torque Calculation

Details: Torque is crucial for understanding an engine's pulling power, acceleration capability, and overall performance characteristics.

4. Using the Calculator

Tips: Enter the horsepower and RPM values. Both must be greater than 0. The calculator will output torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 the magic number in the formula?
A: It comes from the conversion between units of power and rotational speed (1 HP = 33,000 ft-lb/min and 1 revolution = 2π radians).

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

Q3: Can I use this for electric motors?
A: Yes, the formula works for any rotating machinery where you know the HP and RPM.

Q4: What's the difference between torque and horsepower?
A: Torque measures rotational force, while horsepower measures the rate at which work is done (torque × RPM).

Q5: How does torque relate to vehicle performance?
A: Higher torque at lower RPMs generally means better acceleration from a standstill and better towing capability.