Horsepower is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors.

**Formula to calculate horsepower.**

For electric motor,power or horsepower can be calculated from the torque and speed.

Torque – It is the measure of rotational effort applied on engine.

**Example:**

Using 5,252 as radians per second calculate the horsepower of a porsche which generates 480 of torque at 2500RPM.

Therefore the horsepower of the porsche is 228.