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Horsepower Calculator - HP from Torque & RPM
Free horsepower calculator. Calculate engine horsepower from torque and RPM. Understand the relationship between power and torque.
Horsepower Calculator
Calculate HP from torque and RPM
Power Output
Enter your values to see results
and click the "Calculate" button
Horsepower Calculator
Calculate horsepower from torque and RPM. This is the same formula used by engine dynamometers to measure power output.
Horsepower Formula
HP = (Torque × RPM) / 5252
5252 is a constant derived from unit conversions. At 5252 RPM, horsepower and torque are equal numbers.
Frequently Asked Questions
What's the difference between HP and torque?
Torque is rotational force (how hard the engine pushes). Horsepower is the rate of doing work (torque × speed). Torque accelerates, HP maintains speed.
What's better: more HP or more torque?
Depends on use. Trucks/towing: torque matters more. Racing/high speed: HP matters more. Both work together for acceleration.
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