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Number Base Converter

Binary, Octal, Decimal, Hexadecimal & Custom Bases

Type into any box to convert across all number systems in real time:

Presets:
Bitwise Representation
Formatted Nibble Groups (4-Bit)
0000 0000 1111 1111
16-Bit Integer
ASCII Character:ÿ (255)
Base 32:7V
Base 36 (Alphanumeric):73
2's Complement (8-bit signed):-1
Bit Breakdown (MSB → LSB):

Frequently Asked Questions

Binary (Base 2): Uses digits 0 and 1. Machine language of digital processors.
Octal (Base 8): Uses digits 0-7. Used in Unix file permissions (e.g. chmod 755).
Decimal (Base 10): Standard human numbering system using digits 0-9.
Hexadecimal (Base 16): Uses digits 0-9 and letters A-F. Used in memory addresses and HTML/CSS web colors.

Repeatedly divide the decimal number by 2 and write down the remainders in reverse order (from bottom to top). For example, 13 / 2 = 6 (rem 1), 6 / 2 = 3 (rem 0), 3 / 2 = 1 (rem 1), 1 / 2 = 0 (rem 1) → Binary is 1101.