Asciito Binary Converter
Our free numeral systems converter handles asciito binary conversions. See tables, ratios, and examples for quick reference.
Reviewed by Manoj Kumar, Mathematics Educator
Formula
Binary = ASCII code point converted to base-2
Each ASCII character has a decimal code point (0-127). Convert this decimal to binary by repeatedly dividing by 2 and collecting remainders. Pad the result to 8 bits. For example, A = 65 decimal = 01000001 binary.
Worked Examples
Example 1: Converting a Word to Binary
Problem:Convert the text 'Hi' to binary ASCII representation.
Solution:H = ASCII 72 = 01001000\ni = ASCII 105 = 01101001\nBinary output: 01001000 01101001
Result:Hi = 01001000 01101001
Example 2: Binary Back to ASCII Text
Problem:Convert binary 01000001 01000010 01000011 back to text.
Solution:01000001 = 65 = A\n01000010 = 66 = B\n01000011 = 67 = C\nText output: ABC
Result:01000001 01000010 01000011 = ABC
Frequently Asked Questions
What is ASCII and how does it relate to binary?
ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numeric values to 128 characters including letters, digits, punctuation, and control characters. Each ASCII character maps to a number between 0 and 127, which can be represented as a 7-bit binary number (commonly stored in 8 bits with a leading zero). For example, the letter A is ASCII 65, which is 01000001 in binary.
How do I convert an ASCII character to binary manually?
First find the ASCII decimal value of the character using an ASCII table. For example, the letter H is 72. Then convert that decimal number to binary by repeatedly dividing by 2 and recording the remainders: 72 / 2 = 36 remainder 0, 36 / 2 = 18 remainder 0, 18 / 2 = 9 remainder 0, 9 / 2 = 4 remainder 1, 4 / 2 = 2 remainder 0, 2 / 2 = 1 remainder 0, 1 / 2 = 0 remainder 1. Reading remainders bottom to top gives 1001000, padded to 8 bits: 01001000.
Can this converter handle extended ASCII characters?
This converter handles standard ASCII characters with code points 0 through 127. Extended ASCII (characters 128-255) varies by encoding and is not part of the original ASCII standard. For characters beyond the basic ASCII range, UTF-8 or other Unicode encodings are typically used instead. If you enter non-ASCII characters in ASCII-to-binary mode, they will be encoded using their Unicode code point converted to binary.
References
Reviewed by Manoj Kumar, Mathematics Educator · Editorial policy