Enter the power in watts into the calculator to determine the horsepower. This calculator can also evaluate any of the variables given the others are known.

Watts To Horsepower Formula

The following formula is used to calculate the conversion from watts to horsepower.

HP = W / 745.7


  • HP is the horsepower
  • W is the power in watts

To calculate the horsepower, divide the power in watts by 745.7.

What is Watts To Horsepower?

Watts to horsepower is a conversion metric used to translate the amount of electrical power (measured in watts) into mechanical power (measured in horsepower). This conversion is commonly used in various fields like engineering and physics to quantify the rate at which work is done or energy is transferred. The standard conversion factor is that 1 horsepower is equivalent to approximately 745.7 watts.

How to Calculate Watts To Horsepower?

The following steps outline how to calculate the Watts To Horsepower conversion.

  1. First, determine the power in watts (W).
  2. Next, use the formula: HP = W / 745.7.
  3. Finally, calculate the horsepower (HP).
  4. After inserting the value of W and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Power in watts (W) = 500