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HP vs Torque Equations:
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The HP vs Torque Calculator converts between horsepower and torque at specific RPM values. It helps compare engine performance characteristics and understand the relationship between these two important power measurements.
The calculator uses the fundamental equation:
Where:
Explanation: The constant 5252 comes from the relationship where horsepower and torque are equal at 5252 RPM in the imperial measurement system.
Details: Understanding the relationship between horsepower and torque is crucial for engine performance analysis, vehicle tuning, and mechanical engineering applications. Horsepower represents work capacity while torque represents rotational force.
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 the magic number?
A: 5252 is derived from the conversion between foot-pounds per minute and horsepower. One horsepower equals 33,000 foot-pounds per minute, and 33,000 divided by 2π equals approximately 5252.
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 for electric motors?
A: Yes, the relationship applies to all rotating machinery, including electric motors, though electric motors often have different torque curves than internal combustion engines.
Q4: What are typical torque values for cars?
A: Typical passenger cars range from 100-300 lb-ft, while performance vehicles can exceed 500 lb-ft. Diesel engines typically produce higher torque at lower RPMs.
Q5: How does RPM affect the calculation?
A: At higher RPMs, less torque is required to produce the same horsepower. This is why high-revving engines can make significant power with moderate torque figures.