Power and Torque Imperial StandardsHorsepower (HP) Common unit of mechanical power, one HP is the rate of work required to raise 33,000 pounds one foot in one minute.
One Imperial Horsepower Equals 33,000 foot pounds per minute. 36 inch pounds torque at 1750 RPM. .746 Kilowatts. 1.014 Metric Horsepower. (PS) 42.4 BTU per Minute.
Torque (T) Torque is a twisting force. Torque causes rotation of a shaft, TNmechanical2 or it will set up a twist in a stationary shaft. It is generally expressed in foot pounds or in inch pounds. Torque is measured by the load or pull and by the distance of the pull from the center of a shaft.
Calculation Examples
To Calculate HP:
To Calculate T: 
Metric (SI) Standards
Power (P) The basic unit power measurement in the metric (SI) system is the Watt. 1000 Watts = 1 Kilowatt (kW)
Torque (M)
SI Symbols
Calculation Examples
To Calculate P:
To Calculate M:



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