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