2421 Code Calculator – Convert Binary, Decimal, Octal, and Hexadecimal 2421 Code Calculator Conversion Settings Convert From: Binary Decimal Octal Hexa decimal 2421 Code Enter Value: For 2421 Code, enter groups of four digits separated by spaces (e.g., “1011” or “0001 0010”). Convert To: 2421 Code Binary Decimal Octal Hexa decimal Result: 0 Decimal/2421 Conversion Table Mapping between Decimal and 2421 Code Decimal Equivalent 2421 Code 0 0000 1 0001 2 0010 3 0011 4 0100 5 1011 6 1100 7 1101 8 1110 9 1111