ASCII to Octal Conversion

This ASCII to octal converter allows you to convert plain text into octal numbers and back again.

How to Use This Converter

• Type or paste ASCII text to see its octal (base-8) representation
• Or enter octal numbers to convert them back to ASCII characters

The converter works both ways — ASCII to octal and octal to ASCII.

Understanding the Conversion

Each ASCII character maps to a decimal value, which can be converted to octal. Octal (base-8) is another way of representing binary data in a more compact form than binary itself.

For example, the character "A" has a decimal value of 65, which is 101 in octal.

You can use an ASCII table to find decimal values, then convert those to octal manually or using this tool.

Example

Converting "Hello" to octal:

More About ASCII

ASCII is a 7-bit character set, and each character maps to a specific decimal value. These values can be expressed in octal form, which was more commonly used in older computer systems and certain programming environments like early Unix systems.

While octal isn't as widely used today as hexadecimal, it still shows up in specific contexts — especially when dealing with file permissions in Unix-like systems.

You can refer to our full ASCII table for more information.