2421 Code Calculator – Convert Binary, Decimal, Octal, and Hexadecimal
Conversion Settings
For 2421 Code, enter groups of four digits separated by spaces (e.g., “1011” or “0001 0010”).

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Decimal/2421 Conversion Table

Mapping between Decimal and 2421 Code
Decimal Equivalent2421 Code
00000
10001
20010
30011
40100
51011
61100
71101
81110
91111

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