ASCII to Decimal Conversion

The ASCII to decimal converter allows you to convert from ASCII (plain text) to decimal numeric values, and vice versa.

How to Use This Converter

• Enter the ASCII text you want to convert to decimal values
• Or input a sequence of decimal numbers to convert back to ASCII text

This tool supports both ASCII to decimal and decimal to ASCII conversion.

Understanding the Conversion

Each character in ASCII is represented by a specific decimal number. You can look up these values in an ASCII table. We have one available on our reference page!

For example, the uppercase letter "A" corresponds to the decimal value 65. This value comes directly from the ASCII specification.

Using this table, you can easily map text characters to their decimal equivalents and reconstruct text from decimal numbers.

Example

Converting the text "Hello" to decimal.

Using the ASCII table, we find that the characters map to the following decimal values:

More About ASCII

ASCII stands for American Standard Code for Information Interchange. It was developed in the early days of computing to create a standard way of representing text.

Each ASCII character is assigned a unique number between 0 and 127. These decimal values represent everything from uppercase and lowercase letters to digits and punctuation marks.

Although ASCII uses just 7 bits (for 128 total characters), modern systems typically store them in 8-bit bytes, with the extra bit sometimes used for extended character sets or additional symbols.

You can view the full ASCII chart on our ASCII table page.