How many watts are equivalent to one horsepower?

One horsepower is equivalent to 746 watts. This relationship is based on the fact that horsepower is a unit of power used primarily to measure the output of engines and motors, while watts are the SI unit of power. The conversion factor of 746 watts to one horsepower comes from historical definitions and practical measurements of mechanical power.

This conversion is particularly significant in engineering and machinery contexts where understanding the power output of various devices is crucial for performance assessments. For example, when assessing electric motors, knowing the horsepower rating can help determine their energy consumption in watts, allowing for better efficiency and usage planning.

The other options do not align with the established standard for horsepower conversion to watts. Therefore, the correct conversion of 746 watts to one horsepower is key to understanding power ratings in both mechanical and electrical engineering applications.