Horsepower Calculator

Horsepower is a measurement of power. This calculator can be used to calculate the horsepower based on the definition and to convert between different power units. The horsepower is not recognized in the international system of units.

Related:

Engine Horsepower Calculator

Horsepower Calculation Based on Definition

By definition power = force*distance/time.

Force:		newton kilonewton pound-force kilogram-force
Distance:		meter kilometer mile yard
Time:		second minute hour day

Horsepower Converter

Converter between common power units.

Amount:	Convert From:	Convert To:
	Watt Kilowatt Mechanical Horsepower Metric Horsepower Electrical Horsepower Boiler Horsepower BTU/h	Watt Kilowatt Mechanical Horsepower Metric Horsepower Electrical Horsepower Boiler Horsepower BTU/h

The definition of horsepower varied between geographical regions. The following are the most common definitions:

Mechanical horsepower—550 foot-pounds per second, approximately 745.7 watts
• Metric horsepower—75 kgf-m per second, approximately 735.499 watts
• Boiler horsepower—34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit, approximately 9,809.5 watts.
• Electrical horsepower—746 watts.