Home
Back
Torque from HP Formula:
| From: | To: |
Horsepower (HP) is a unit of measurement for power, representing the rate at which work is done. Torque is a measure of rotational force, representing the twisting force that causes rotation. In automotive and mechanical applications, these two values are fundamentally related.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM. At 5252 RPM, horsepower and torque are numerically equal in the imperial system.
Details: Understanding the relationship between horsepower and torque is crucial for engine performance analysis, vehicle tuning, mechanical design, and comparing different engines or motors for specific applications.
Tips: Enter horsepower and RPM values. Both values must be positive numbers. The calculator will compute the corresponding torque in pound-feet.
Q1: Why is 5252 the magic number?
A: 5252 is derived from the conversion between units: 1 horsepower = 550 foot-pounds per second, and there are 60 seconds in a minute and 2π radians in a revolution.
Q2: What's the difference between horsepower and torque?
A: Torque is the rotational force, while horsepower is the rate at which work is done. Horsepower = (Torque × RPM) / 5252.
Q3: Can I use this for electric motors?
A: Yes, the formula applies to any rotating machinery where you know the horsepower and RPM values.
Q4: What are typical torque values for cars?
A: Typical passenger cars range from 100-300 lb-ft, while performance vehicles can exceed 500 lb-ft. Diesel engines typically produce higher torque at lower RPMs.
Q5: How does torque affect vehicle performance?
A: Higher torque provides better acceleration and towing capacity, while horsepower determines top speed. The torque curve across the RPM range affects drivability.