Uncover the intricate relationship between horsepower, torque, and RPM with our essential online calculator. Whether you're a car enthusiast, mechanic, or engineer, quickly determine crucial engine power outputs and rotational force to optimize performance and efficiency.
Formula:
The relationship between horsepower (HP), torque (T in lb-ft), and revolutions per minute (RPM) is defined by the following fundamental formulas:
- To calculate Horsepower (HP) from Torque and RPM:
- To calculate Torque (T) from Horsepower and RPM:
HP = (Torque × RPM) / 5252
T = (HP × 5252) / RPM
Where:
- HP = Horsepower (in units of horsepower)
- Torque = Rotational force (in pound-feet, lb-ft)
- RPM = Revolutions Per Minute (engine speed, often measured at the crankshaft)
- 5252 = A mathematical constant derived from converting units (radians per second to RPM, and foot-pounds to horsepower-seconds). This constant is specifically used when torque is measured in pound-feet.