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Torque Formula:
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The torque formula T = (HP × 5252) / RPM calculates torque from horsepower and RPM. This fundamental equation is widely used in mechanical engineering and automotive applications to determine the rotational force produced by an engine or motor.
The calculator uses the torque formula:
Where:
Explanation: The constant 5252 is derived from the relationship between horsepower, torque, and RPM, where 1 horsepower is defined as 550 foot-pounds per second and there are 60 seconds in a minute (550 × 60 ÷ 2π ≈ 5252).
Details: Accurate torque calculation is essential for engine performance analysis, transmission design, vehicle dynamics, and mechanical system optimization. Torque represents the rotational force that determines a vehicle's acceleration and towing capability.
Tips: Enter horsepower and RPM values. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is 5252 used in the torque formula?
A: The constant 5252 comes from the conversion between horsepower (550 ft-lb/sec) and RPM (revolutions per minute) with the relationship that 1 HP = 550 × 60 ÷ 2π ≈ 5252.
Q2: What are typical torque values for automotive engines?
A: Typical passenger car engines produce 100-400 lb-ft of torque, while heavy-duty diesel engines can produce over 1,000 lb-ft of torque.
Q3: How does torque relate to vehicle performance?
A: Torque determines a vehicle's acceleration and pulling power. Higher torque values generally mean 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 have different torque curves than 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 work done over time. Horsepower = (Torque × RPM) ÷ 5252.