Megawatts to horsepower (metric) conversion calculator shown above calculates how many horsepower (metric) are in 'X' megawatts (where 'X' is the number of megawatts to convert to horsepower (metric)). In order to convert a value from megawatts to horsepower (metric) (from MW to hp) type the number of MW to be converted to hp and then click on the 'convert' button.