🔥 Free BCD Converter – Binary Coded Decimal Translator
BCD Converter
Translate decimal numbers to 8421 Binary Coded Decimal with real-time visual mapping.
Decimal Number (Base 10)
DEC
Binary Coded Decimal
8421 BCD
⚠️ Invalid BCD! Standard 8421 BCD only allows nibbles from 0000 to 1001 (0-9).
Visual Nibble Mapping
8421 BCD Reference Table
00000
10001
20010
30011
40100
50101
60110
70111
81000
91001
Unlike standard binary, BCD converts each decimal digit into a strict 4-bit sequence (a nibble).