Horsepower
Mechanical engineering unit of power. Defined as 550 foot-pounds per second.
| 1 horsepower (hp) | = | 550 ft lbf s-1 | 1 hp | = | 33000 ft lbf min-1 | |
| 1 hp | = | 745.7 W | 1 hp | = | 1.014 metric horsepower (PS or ch) | |
| 1 hp | = | 2546 Btu h-1 | 1 hp | = | 42.433 Btu min-1 | |
| 1 hp | = | 0.178 kg cal s-1 | 1 hp | = | 641.6 kg cal h-1 |
Originally defined by James Watt as 33000 ft lb of work done by a horse in 1 minute.
See also: Cheval Vapeur, Indicated Horsepower, Power, RAC Horsepower Rating, Torque to Power.
Subjects: Mechanical Engineering