Full name: horsepower [international]
Plural form: horsepower
Symbol: hp
Category type: power
Scale factor: 745.69987158227
The SI derived unit for power is the watt.
1 watt is equal to 0.001341022089595 Horsepower.
Valid units must be of the power type.
You can use this form to select from known units:
The term horsepower was invented by the engineer James Watt in 1782. Mechanical horsepower is defined in this way:
1 hp = 33,000 ft·pound-force·min−1 = exactly 745.69987158227022 W