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Horsepower To Torque Formula:
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The horsepower to torque formula calculates the torque output of an engine based on its horsepower and RPM. This relationship is fundamental in understanding engine performance characteristics.
The calculator uses the formula:
Where:
Explanation: The constant 5252 is derived from the relationship between horsepower, torque, and RPM, where horsepower and torque are equal at 5252 RPM in the imperial system.
Details: Torque represents the rotational force an engine produces, which directly affects acceleration, towing capacity, and overall vehicle performance. Understanding the torque curve helps in engine tuning and vehicle selection.
Tips: Enter horsepower in hp and RPM values. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is 5252 the constant in this formula?
A: 5252 is derived from the relationship between horsepower, torque, and RPM. It's the point where horsepower and torque values are equal in the imperial measurement system.
Q2: What's the difference between horsepower and torque?
A: Torque is a measure of rotational force, while horsepower is a measure of work done over time. Horsepower = (Torque × RPM) / 5252.
Q3: Can I use this formula for electric motors?
A: Yes, the formula works for any rotational power system, including electric motors, as long as you're using consistent units (hp for power, lb-ft for torque).
Q4: How does gear ratio affect torque?
A: Gear ratios multiply torque. The torque at the wheels is the engine torque multiplied by the gear ratio and final drive ratio (minus drivetrain losses).
Q5: What is a typical torque value for passenger cars?
A: Most passenger cars produce between 100-300 lb-ft of torque, while performance vehicles and trucks can produce 400-1000+ lb-ft depending on the engine.