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Horsepower to Torque Formula:
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The horsepower to torque conversion calculates the rotational force (torque) produced by an engine based on its horsepower and RPM. This relationship is fundamental in understanding engine performance characteristics.
The calculator uses the standard horsepower to torque formula:
Where:
Explanation: The constant 5252 comes from the fact that 1 horsepower is defined as 550 foot-pounds per second, and there are 2π radians in a revolution.
Details: Torque measurement is crucial for understanding engine performance, vehicle acceleration, towing capacity, and overall mechanical efficiency. It helps engineers and mechanics optimize engine performance and select appropriate gearing.
Tips: Enter horsepower and RPM values. Both values must be positive numbers. The calculator will compute the corresponding torque in pound-feet (lb-ft).
Q1: Why is 5252 used in the formula?
A: 5252 is a constant derived from the relationship between horsepower, torque, and RPM. It comes from the conversion factors between different units of measurement (1 HP = 550 ft-lb/s and there are 2π radians per revolution).
Q2: What's the difference between horsepower and torque?
A: Horsepower measures the rate of doing work (power), while torque measures rotational force. Horsepower = (Torque × RPM) / 5252.
Q3: At what RPM does horsepower equal torque?
A: Horsepower and torque values are equal at 5252 RPM, which is why this number appears in the conversion formula.
Q4: Can this formula be used for electric motors?
A: Yes, the formula works for any rotating machinery, including electric motors, as long as the units are consistent (HP and RPM).
Q5: How accurate is this calculation?
A: The calculation is mathematically exact based on the definition of horsepower and torque. However, real-world engine performance may vary due to efficiency losses and other factors.