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Base Converter

Convert numbers between Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16) instantly.

FREE BIN · OCT · DEC · HEX INSTANT

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📊 Quick Reference Table

Decimal	Binary	Octal	Hex

Binary (Base 2)

Digits: 0, 1. Used by all computers and digital systems at the hardware level.

Octal (Base 8)

Digits: 0–7. Used in Unix file permissions (e.g. chmod 755).

Decimal (Base 10)

Digits: 0–9. The everyday number system.

Hexadecimal (Base 16)

Digits: 0–9 + A–F. Used in colors (#FF5733), memory addresses, and encoding.

One hex digit = 4 binary digits (a "nibble"). Two hex digits = one byte (8 bits). So FF = 11111111 = 255.