Number Base Converter

Input

Input Base

Decimal value

Binary (Base 2)

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Octal (Base 8)

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Hexadecimal (Base 16)

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How to use

1.
Select the input base (binary, octal, decimal, or hexadecimal)
2.
Enter your number — all other representations appear instantly

Common uses

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Converting memory addresses from hex to decimal while debugging
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Understanding binary representations of integers in low-level code
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Converting color channel values between decimal and hex

Computers store all data in binary (base 2). Hexadecimal (base 16) is a compact shorthand — each hex digit represents exactly 4 bits, which is why it is common in color codes (#FF0000), memory addresses, and byte-level data.