Converting ASCII to hexadecimal is a common task in computer programming. ASCII is a character encoding standard that assigns a unique number to each character. Hexadecimal, on the other hand, is a base16
number system that uses sixteen digits, 0 through 9 and A through F. Converting ASCII to hexadecimal involves converting each character to its corresponding hexadecimal value.
Conversion
Here’s a stepbystep guide on how to convert ASCII to hexadecimal:
 Choose the ASCII character you want to convert to hexadecimal.
 Convert the ASCII character to its decimal value using an ASCII table.
 Convert the decimal value to hexadecimal using the divisionby16 method.
 Pad the hexadecimal value with leading zeros to make it 2 digits long (if necessary).
Example
Let’s walk through an example to illustrate the process. Suppose we want to convert the ASCII character ‘A’ to hexadecimal.

The ASCII value of ‘A’ is 65.

To convert 65 to hexadecimal, we use the divisionby16 method. We divide 65 by 16 and get a quotient of 4 with a remainder of 1. We write down the remainder (1) as the least significant digit of the hexadecimal value. We then divide 4 by 16 and get a quotient of 0 with a remainder of 4. We write down the remainder (4) as the next digit of the hexadecimal value. The hexadecimal value of 65 is 41.
Quotient Remainder Hexadecimal $65/16=4$ 1 1 $4/16=0$ 4 41 
Since the hexadecimal value we obtained in step 2 is only 2 digits long, we don’t need to pad it with leading zeros.
ASCIIHexadecimal 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.