Millimeters per second to feet per minute conversion calculator shown above calculates how many feet per minute are in 'X' millimeters per second (where 'X' is the number of millimeters per second to convert to feet per minute). In order to convert a value from millimeters per second to feet per minute (from mm/s to ft/min) simply type the number of mm/s to be converted to ft/min and then click on the 'convert' button.