42 decimeters equals 4,200 milimeters.
Convert 42 decimeters into meters, kilometers, centimeters, micrometers, nanometers, picometers, inches, feet, yards, miles, hands, lightyears, astronomical units, parsecs, etc...
Convert 4200 milimeters into meters, kilometers, centimeters, micrometers, nanometers, picometers, inches, feet, yards, miles, hands, lightyears, astronomical units, parsecs, etc...