Tablespoons (metric) to cubic millimeters conversion calculator above calculates how many cubic millimeters are in 'X' tablespoons (metric) (where 'X' is the number of tablespoons (metric) to convert to cubic millimeters). In order to convert a value from tablespoons (metric) to cubic millimeters simply type the number of tablespoons (metric) to be converted to mm³ and then click on the 'convert' button.