Power Converter
Convert any power value between SI units, horsepower and thermal units.
From
To
1 hp =
| Watt | 745.6999 W |
| Kilowatt | 0.7457 kW |
| Megawatt | 0.000746 MW |
| Metric horsepower | 1.01387 PS |
| BTU per hour | 2,544.434284 BTU/h |
| Foot-pound per second | 549.999189 ft-lb/s |
About this calculator
Power is the rate at which energy is transferred or work is done, measured in watts (joules per second) in the SI system. Engines and motors are often rated in horsepower — either the mechanical horsepower (745.7 W) common in the US, or the metric horsepower (735.5 W) used in Europe.
This converter uses the watt as its base unit. One kilowatt equals 1000 watts, one mechanical horsepower equals about 745.7 W, and one BTU per hour equals about 0.293 W. It is useful for HVAC, automotive and electrical calculations.
Frequently asked questions
One mechanical horsepower equals about 745.7 watts; one metric horsepower equals about 735.5 watts.
Divide kilowatts by 0.7457 (or multiply by about 1.341) to get mechanical horsepower.
Mechanical (imperial) horsepower is 745.7 W, while metric horsepower (PS) is 735.5 W — about 1.4% smaller.
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