🔤 ASCII Converter
Choose a character to see its ASCII decimal code along with the equivalent binary, hexadecimal, and octal values.
What this calculator does
Every character your computer displays is stored internally as a number. This converter takes a printable ASCII character and shows its standard numeric code in decimal, binary, hexadecimal, and octal.
How the calculation works
The tool reads the character’s standard ASCII code point (0-127 for classic ASCII) and converts that same decimal number into base 2 (binary), base 16 (hexadecimal), and base 8 (octal) using standard number-base conversion.
This is the same table used by programming languages, terminals, and network protocols, so the values shown are exact, not approximations.
Last reviewed August 2026