1. What is the Horsepower Formula?

Definition: This calculator computes mechanical horsepower based on torque and rotational speed (RPM).

Purpose: It helps engineers, mechanics, and automotive enthusiasts determine engine power output.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower
• \( T \) — Torque (pound-feet)
• \( RPM \) — Rotations per minute
• 5252 — Conversion constant (derived from the relationship between foot-pounds and horsepower)

Explanation: Horsepower is calculated by multiplying torque by RPM and dividing by the constant 5252.

3. Importance of Horsepower Calculation

Details: Horsepower measurements are crucial for engine performance evaluation, vehicle comparisons, and mechanical system design.

4. Using the Calculator

Tips: Enter torque in pound-feet and engine speed in RPM. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used?
A: 5252 is derived from the relationship between foot-pounds per minute and horsepower (1 HP = 33,000 ft-lb/min, and 5252 = 33,000/2π).

Q2: What's a typical torque value for cars?
A: Passenger cars typically range from 100-300 lb-ft, while performance vehicles can exceed 500 lb-ft.

Q3: At what RPM does torque equal horsepower?
A: At exactly 5252 RPM, the horsepower and torque values will be numerically equal due to the formula.

Q4: Can I use this for electric motors?
A: Yes, the formula works for any rotational power system, including electric motors.

Q5: How accurate is this calculation?
A: This gives theoretical mechanical horsepower. Actual power at the wheels may differ due to drivetrain losses.