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Torque Formula:
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Torque is a measure of the rotational force applied to an object. In automotive and mechanical engineering, torque represents the twisting force that causes rotation, measured in pound-feet (lb-ft) or Newton-meters (N·m).
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. The formula shows the inverse relationship between torque and RPM for a given horsepower.
Details: Torque calculation is essential for engine performance analysis, vehicle acceleration assessment, gear ratio selection, and understanding the power characteristics of mechanical systems. It helps engineers optimize engine design and transmission systems.
Tips: Enter horsepower and RPM values. Both values must be positive numbers (HP > 0, RPM > 0). The calculator will compute the corresponding torque in pound-feet.
Q1: Why is 5252 used in the formula?
A: 5252 is a constant derived from the definition of horsepower (1 HP = 550 ft-lb/s) and the conversion between seconds and minutes (60 seconds/minute).
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: At what RPM does horsepower equal torque?
A: Horsepower and torque are numerically equal at 5252 RPM, as evident from the formula.
Q4: Can this formula be used for electric motors?
A: Yes, the formula applies to any rotating mechanical system where horsepower and RPM are known.
Q5: How accurate is this calculation?
A: The calculation is mathematically precise for the given inputs, but real-world factors like mechanical losses may affect actual torque output.