1. What is the Horsepower Formula?

The horsepower formula calculates power output from torque and rotational speed (RPM). The constant 5252 comes from the conversion between foot-pounds per minute and horsepower.

2. How Does the Calculator Work?

The calculator uses the horsepower formula:

Where:

• \( HP \) — Horsepower (hp)
• \( T \) — Torque (lb-ft)
• \( RPM \) — Rotations per minute (rpm)
• 5252 — Conversion constant

Explanation: This formula shows the direct relationship between torque, rotational speed, and power output in mechanical systems.

3. Importance of Horsepower Calculation

Details: Horsepower is a critical measurement in automotive, mechanical engineering, and industrial applications for evaluating engine and motor performance, comparing power outputs, and designing mechanical systems.

4. Using the Calculator

Tips: Enter torque in pound-feet (lb-ft) and RPM values. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used in the formula?
A: 5252 is the conversion factor between foot-pounds per minute and horsepower, where 1 horsepower equals 33,000 foot-pounds per minute, and 33,000 divided by 2π equals approximately 5252.

Q2: What's the difference between horsepower and torque?
A: Torque is a measure of rotational force, while horsepower is a measure of power (work done over time). Horsepower combines both torque and RPM.

Q3: At what RPM does horsepower equal torque?
A: Horsepower and torque values are equal at 5252 RPM due to the constant in the formula.

Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating machinery, including electric motors, internal combustion engines, and turbines.

Q5: How accurate is this calculation?
A: The formula provides theoretical mechanical horsepower. Actual delivered power may vary due to efficiency losses, transmission systems, and other factors.