How to Convert ASCII to Binary

Converting ASCII to binary is a common task in computer programming. ASCII is a character encoding standard that assigns a unique number to each character. Binary, on the other hand, is a base-2 number system that uses only two digits, 0 and 1. Converting ASCII to binary involves converting each character to its corresponding binary value.

Conversion

Here's a step-by-step guide on how to convert ASCII to binary:

1. Choose the ASCII character you want to convert to binary.
2. Convert the ASCII character to its decimal value using an ASCII table.
3. Convert the decimal value to binary using the division-by-2 method.
4. Pad the binary value with leading zeros to make it 8 bits long (if necessary).

Example

Let's walk through an example to illustrate the process. Suppose we want to convert the ASCII character 'A' to binary.

1. The ASCII value of 'A' is 65.
2. To convert 65 to binary, we use the division-by-2 method. We divide 65 by 2 and get a quotient of 32 with a remainder of 1. We write down the remainder (1) as the least significant bit of the binary value. We then divide 32 by 2 and get a quotient of 16 with a remainder of 0. We write down the remainder (0) as the next bit of the binary value. We continue this process until we have 8 bits. The binary value of 65 is 01000001.
3. Since the binary value we obtained in step 2 is already 8 bits long, we don't need to pad it with leading zeros.

Quotient	Remainder	Binary Value
$65/2=32$	1	1
$32/2=16$	0	01
$16/2=8$	0	001
$8/2=4$	0	0001
$4/2=2$	0	00001
$2/2=1$	0	000001
$1/2=0$	1	1000001

ASCII-Binary Table

Here's a table of the ASCII characters and their corresponding binary values:

Character	Description	Decimal	Binary
0	Zero	48	00110000
1	One	49	00110001
2	Two	50	00110010
3	Three	51	00110011
4	Four	52	00110100
5	Five	53	00110101
6	Six	54	00110110
7	Seven	55	00110111
8	Eight	56	00111000
9	Nine	57	00111001
A	Capital A	65	01000001
B	Capital B	66	01000010
C	Capital C	67	01000011
D	Capital D	68	01000100
E	Capital E	69	01000101
F	Capital F	70	01000110
G	Capital G	71	01000111
H	Capital H	72	01001000
I	Capital I	73	01001001
J	Capital J	74	01001010
K	Capital K	75	01001011
L	Capital L	76	01001100
M	Capital M	77	01001101
N	Capital N	78	01001110
O	Capital O	79	01001111
P	Capital P	80	01010000
Q	Capital Q	81	01010001
R	Capital R	82	01010010
S	Capital S	83	01010011
T	Capital T	84	01010100
U	Capital U	85	01010101
V	Capital V	86	01010110
W	Capital W	87	01010111
X	Capital X	88	01011000
Y	Capital Y	89	01011001
Z	Capital Z	90	01011010
a	Small a	97	01100001
b	Small b	98	01100010
c	Small c	99	01100011
d	Small d	100	01100100
e	Small e	101	01100101
f	Small f	102	01100110
g	Small g	103	01100111
h	Small h	104	01101000
i	Small i	105	01101001
j	Small j	106	01101010
k	Small k	107	01101011
l	Small l	108	01101100
m	Small m	109	01101101
n	Small n	110	01101110
o	Small o	111	01101111
p	Small p	112	01110000
q	Small q	113	01110001
r	Small r	114	01110010
s	Small s	115	01110011
t	Small t	116	01110100
u	Small u	117	01110101
v	Small v	118	01110110
w	Small w	119	01110111
x	Small x	120	01111000
y	Small y	121	01111001
z	Small z	122	01111010

See full ascii table here.

Sample Code

This code requires @ilihub/code npm package to run.

import { AsciiToBinary } from "@ilihub/code";

const ascii = "Hello World";

const binary = AsciiToBinary(ascii);
console.log(binary);

// Output
// 0100 1000 0110 0101 0110 1100 0110 1100 0110 1111 0010
// 0000 0101 0111 0110 1111 0111 0010 0110 1100 0110 0100

References

• ASCII Number
• Binary Number
• Decimal Number

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