Calories per second to horsepower (metric) conversion calculator above calculates how many horsepower (metric) are in 'X' calories per second (where 'X' is the number of calories per second to convert to horsepower (metric)). In order to convert a value from calories per second to horsepower (metric) (from cal/s to hp) simply type the number of cal/s to be converted to hp and then click on the 'convert' button.