UnitConHorsepower to Watts Converter
Convert horsepower to watts for electrical system design, motor selection, and international engineering communication. As electric motors replace combustion engines, converting from horsepower to watts is increasingly necessary.
Formula
Multiply mechanical horsepower by 745.699 to get watts. To reverse, divide watts by 745.699 to get horsepower.
Quick reference
| Horsepower (Mechanical) (hp) | Watt (W) |
|---|---|
| 0.5 | 372.8499 |
| 1 | 745.6999 |
| 2 | 1,491.4 |
| 5 | 3,728.499 |
| 10 | 7,456.999 |
| 25 | 18,642.5 |
| 50 | 37,284.99 |
| 75 | 55,927.49 |
| 100 | 74,569.99 |
| 200 | 149,140 |
About these units
Horsepower (Mechanical)
The horsepower was defined by James Watt in the 1780s as approximately 33,000 foot-pounds per minute, the estimated sustained output of a working horse. It spread through the industrialized world with the steam engine.
Watt
The watt became the SI unit of power in 1948 and is now the global standard for electrical and mechanical power. Motor nameplates, solar panels, and power stations worldwide use watts or kilowatts.