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Glossary Data & Encoding

Hexadecimal

Hexadecimal (hex) is the base-16 number system, using digits 0-9 and letters A-F, widely used as a compact way to write binary data.

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In more detail

One hex digit is exactly four bits, so a Byte is always two hex digits (00 to FF). Hex appears in colour codes (#FF8800), MAC addresses, memory dumps and file signatures. In code it is often prefixed 0x.

Example

CA in hex is 202 in decimal and 11001010 in binary.

Try these tools

HEX to Decimal Converter

Convert any hex value to dec instantly with bit/byte breakdown - ideal for colors, memory addresses, and code.

Decimal to HEX Converter

Convert decimal numbers (Base-10) to hexadecimal (Base-16).

HEX to RGB Converter

Convert HEX color codes to RGB values instantly.

Hex Calculator

A free online hexadecimal calculator for arithmetic (add, subtract, multiply, divide) and bitwise (AND, OR, XOR, NOT.

See also

  • Glossary Binary
    Binary is the base-2 number system, using only the digits 0 and 1, which computers use because electronic circuits are either off or on.
  • Glossary Byte
    A byte is a unit of digital information made of 8 bits, able to hold 256 different values from 0 to 255.
  • Guide How Number Bases Work: Binary, Octal and Hex
    Place value in binary, octal and hexadecimal, converting 202 between all of them step by step, hex colours.
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