Horsepower (mechanical) to megawatts converter above calculates how many megawatts are in 'X' horsepower (mechanical) (where 'X' is the number of horsepower (mechanical) to convert to megawatts). In order to convert a value from horsepower (mechanical) to megawatts (from hp to MW) simply type the number of hp to be converted to MW and then click on the 'convert' button.