**Full name:** horsepower [international]

**Plural form:** horsepower

**Symbol:** hp

**Category type:** power

**Scale factor:** 745.699871582

horsepower [electric]

horsepower [international]

horsepower [metric]

horsepower [water]

The SI derived unit for power is the watt.

1 watt is equal to 0.0013410220896 HP.

Valid units must be of the **power** type.

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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

HP to foot poundal/second

HP to foot poundal/hour

HP to yoctowatt

HP to Btu/minute [I.T.]

HP to kilopond meter/hour

HP to microwatt

HP to newton meter/second

HP to erg/minute

HP to Btu/second [I.T.]