4 lightyears equals 37,842,921,890,323.2 kilometers.
Convert 4 lightyears into meters, decimeters, centimeters, milimeters, micrometers, nanometers, picometers, inches, feet, yards, miles, hands, astronomical units, parsecs, etc...
Convert 37842921890324 kilometers into meters, decimeters, centimeters, milimeters, micrometers, nanometers, picometers, inches, feet, yards, miles, hands, astronomical units, parsecs, etc...