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Torque Formula:
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Torque calculation from horsepower and RPM is a fundamental equation in mechanical engineering that determines the rotational force produced by an engine or motor. The relationship between horsepower, torque, and RPM is defined by the formula: T = (HP × 5252) / RPM.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 is derived from the relationship between rotational speed and power, where 1 horsepower is defined as 550 foot-pounds per second and there are 60 seconds in a minute.
Details: Accurate torque calculation is essential for engine performance analysis, vehicle design, mechanical system optimization, and understanding the power characteristics of rotational systems.
Tips: Enter horsepower in hp and RPM values. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is 5252 used in the formula?
A: The number 5252 comes from the conversion factors between horsepower (550 ft-lb/sec) and RPM (60 seconds/minute): 550 × 60 ÷ 2π ≈ 5252.
Q2: What are typical torque values for 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, while horsepower relates to top speed. Higher torque at lower RPMs generally means better low-end acceleration.
Q4: Can this formula be used for electric motors?
A: Yes, the same formula applies to electric motors, though their torque characteristics differ from combustion engines, typically providing maximum torque at zero RPM.
Q5: How accurate is this calculation?
A: The formula is mathematically precise for the given inputs. Accuracy depends on the precision of the horsepower and RPM measurements used in the calculation.