How to Convert Hexadecimal to ASCII

Converting hexadecimal to ASCII is a common task in computer programming. Hexadecimal is a base-16 number system that uses sixteen digits, 0 through 9 and A through F. Decimal is a base-10 number system that uses ten digits, 0 through 9. ASCII is a character encoding standard that assigns a unique number to each character. Converting hexadecimal to ASCII involves converting the hexadecimal number to decimal, and then looking up the ASCII character corresponding to each decimal value using an ASCII table.

Conversion

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

1. Choose the hexadecimal value you want to convert to ASCII.

2. Convert the hexadecimal value to decimal using the following formula:

   decimal = $(16^2 \times h1) + (16^1 \times h2) + (16^0 \times h3) + ... + (16^n \times hn)$

   where h1, h2, h3, ..., hn are the hexadecimal digits and n is the number of digits in the hexadecimal value.

3. Look up the ASCII character corresponding to each decimal value using an ASCII table.

Example

Let's walk through an example to illustrate the process. Suppose we want to convert the hexadecimal value 41 to ASCII.

1. The hexadecimal value we want to convert is 41.

2. We convert the hexadecimal value to decimal using the formula:

   decimal = $(16^1 \times 4) + (16^0 \times 1) = 65$

3. We look up the ASCII character corresponding to the decimal value using an ASCII table. The ASCII character corresponding to 65 is 'A'.

ASCII-Hexadecimal Table

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

Character	Description	Decimal	Hexadecimal
0	Zero	48	30
1	One	49	31
2	Two	50	32
3	Three	51	33
4	Four	52	34
5	Five	53	35
6	Six	54	36
7	Seven	55	37
8	Eight	56	38
9	Nine	57	39
A	Capital A	65	41
B	Capital B	66	42
C	Capital C	67	43
D	Capital D	68	44
E	Capital E	69	45
F	Capital F	70	46
G	Capital G	71	47
H	Capital H	72	48
I	Capital I	73	49
J	Capital J	74	4A
K	Capital K	75	4B
L	Capital L	76	4C
M	Capital M	77	4D
N	Capital N	78	4E
O	Capital O	79	4F
P	Capital P	80	50
Q	Capital Q	81	51
R	Capital R	82	52
S	Capital S	83	53
T	Capital T	84	54
U	Capital U	85	55
V	Capital V	86	56
W	Capital W	87	57
X	Capital X	88	58
Y	Capital Y	89	59
Z	Capital Z	90	5A
a	Small a	97	61
b	Small b	98	62
c	Small c	99	63
d	Small d	100	64
e	Small e	101	65
f	Small f	102	66
g	Small g	103	67
h	Small h	104	68
i	Small i	105	69
j	Small j	106	6A
k	Small k	107	6B
l	Small l	108	6C
m	Small m	109	6D
n	Small n	110	6E
o	Small o	111	6F
p	Small p	112	70
q	Small q	113	71
r	Small r	114	72
s	Small s	115	73
t	Small t	116	74
u	Small u	117	75
v	Small v	118	76
w	Small w	119	77
x	Small x	120	78
y	Small y	121	79
z	Small z	122	7A

See full ascii table here.

References

• ASCII Number
• Decimal Number
• Hexadecimal Number