1. What is a Torque Calculator from HP and RPM?

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

Purpose: It helps engineers, mechanics, and automotive enthusiasts determine the torque produced by an engine or motor.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque (pound-feet)
• \( HP \) — Horsepower
• \( RPM \) — Revolutions per minute

Explanation: The constant 5252 comes from the relationship between rotational speed and power, where torque and RPM intersect at 5252 RPM in the horsepower equation.

3. Importance of Torque Calculation

Details: Torque is a crucial measurement in automotive and mechanical applications, indicating an engine's rotational force and its ability to do work.

4. Using the Calculator

Tips: Enter the horsepower and RPM values. Both values must be greater than 0 for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 used in the formula?
A: 5252 is the RPM at which horsepower and torque (in lb-ft) are numerically equal, derived from the relationship between rotational speed and power.

Q2: What units does this calculator use?
A: This calculator uses horsepower (HP) for power, RPM for speed, and outputs torque in pound-feet (lb-ft).

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

Q4: What's the relationship between torque and horsepower?
A: Horsepower is a function of torque and RPM. More torque at the same RPM means more horsepower.

Q5: Why does torque decrease as RPM increases?
A: In most engines, torque peaks at lower RPMs because engine breathing becomes less efficient at higher speeds.