Number Base Converter

Convert numbers between binary, decimal, hexadecimal, and octal number systems.

Number Conversion

Try these examples:

255 (Decimal)
Common RGB value
101010 (Binary)
Binary representation of 42
FF (Hexadecimal)
Max value in 8 bits
777 (Octal)
Common permission value
Binary (Base 2)
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Decimal (Base 10)
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Hexadecimal (Base 16)
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Octal (Base 8)
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About Number Systems

Binary (Base 2)

Uses only two digits: 0 and 1. Foundation of all digital systems and computer architecture.

Decimal (Base 10)

Uses ten digits: 0-9. The most common number system used in everyday life.

Hexadecimal (Base 16)

Uses sixteen digits: 0-9 and A-F. Commonly used in computing and programming.

Octal (Base 8)

Uses eight digits: 0-7. Historically used in computing but less common today.

Conversion completed!