Home
Back
Torque Formula:
| From: | To: |
The torque formula \( T = \frac{HP \times 5252}{RPM} \) calculates torque from horsepower and RPM. This formula is derived from the fundamental relationship between power, torque, and rotational speed in mechanical systems.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 comes from the fact that one horsepower is defined as 550 foot-pounds per second, and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).
Details: Torque calculation is essential for understanding engine performance, mechanical advantage, and power transmission in various mechanical systems including automotive engines, industrial machinery, and power tools.
Tips: Enter horsepower in hp and RPM in rotations per minute. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between horsepower (550 ft-lb/sec) and rotational speed (RPM), accounting for the relationship between linear and rotational motion.
Q2: What are typical torque values for different engines?
A: Torque values vary significantly by engine type. Small car engines might produce 100-200 lb-ft, while large diesel engines can produce over 1000 lb-ft of torque.
Q3: How does torque relate to vehicle performance?
A: Torque determines a vehicle's acceleration and pulling power. Higher torque at lower RPMs generally means better low-end acceleration and towing capability.
Q4: Can this formula be used for electric motors?
A: Yes, the same formula applies to electric motors, though electric motors typically produce maximum torque at zero RPM, unlike internal combustion engines.
Q5: What's the difference between torque and horsepower?
A: Torque is a measure of rotational force, while horsepower is a measure of power (work done over time). Horsepower = (Torque × RPM) ÷ 5252.