ASCII to Octal Converter

Converting ASCII to Octal

ASCII is one of the oldest character encodings, allowing for computers to represent binary numbers as text. Due to hardware limitations at the time of its inception, ASCII has only 128 code points, and only 95 of them are printable characters. For this reason, most modern computers use UTF-8, which represents the millions of code points covered by Unicode. However, UTF-8 has the same first 128 code points as ASCII, making UTF-8 an ASCII superset.

The steps to convert an ASCII character to an octal string are as follows:

Obtain the character that you want to convert
Find its corresponding decimal character using an ASCII table
Convert the decimal number to a three digit octal number
Repeat for any other characters

An ASCII table is provided below for your convenience.

Example: Encoding the letter "A" into octal

Using the ASCII table, the conversion is as follows:

"A" = 65₁₀ = 64×1+1 = 64×8²+0×8¹+1×8⁰ = 101₈

Alternate Encodings

ASCII is not the only encoding type used today. In its non-extended form, it only has the capability to represent 128 basic characters. To combat this, the UTF-8 encoding was created, capable of representing all 1,112,064 valid Unicode characters. Other, less popular encodings have been created, primarily for the purpose of better representing other script types, or as proprietary encodings for specific machines. This converter uses the UTF-8 encoding.

ASCII Table

ASCII Character	Hexadecimal	Binary	Decimal
NUL	00	00000000	0
SOH	01	00000001	1
STX	02	00000010	2
ETX	03	00000011	3
EOT	04	00000100	4
ENQ	05	00000101	5
ACK	06	00000110	6
BEL	07	00000111	7
BS	08	00001000	8
HT	09	00001001	9
LF	0A	00001010	10
VT	0B	00001011	11
FF	0C	00001100	12
CR	0D	00001101	13
SO	0E	00001110	14
SI	0F	00001111	15
DLE	10	00010000	16
DC1	11	00010001	17
DC2	12	00010010	18
DC3	13	00010011	19
DC4	14	00010100	20
NAK	15	00010101	21
SYN	16	00010110	22
ETB	17	00010111	23
CAN	18	00011000	24
EM	19	00011001	25
SUB	1A	00011010	26
ESC	1B	00011011	27
FS	1C	00011100	28
GS	1D	00011101	29
RS	1E	00011110	30
US	1F	00011111	31
Space	20	00100000	32
!	21	00100001	33
"	22	00100010	34
#	23	00100011	35
$	24	00100100	36
%	25	00100101	37
&	26	00100110	38
'	27	00100111	39
(	28	00101000	40
)	29	00101001	41
*	2A	00101010	42
+	2B	00101011	43
,	2C	00101100	44
-	2D	00101101	45
.	2E	00101110	46
/	2F	00101111	47
0	30	00110000	48
1	31	00110001	49
2	32	00110010	50
3	33	00110011	51
4	34	00110100	52
5	35	00110101	53
6	36	00110110	54
7	37	00110111	55
8	38	00111000	56
9	39	00111001	57
:	3A	00111010	58
;	3B	00111011	59
<	3C	00111100	60
=	3D	00111101	61
>	3E	00111110	62
?	3F	00111111	63
@	40	01000000	64
A	41	01000001	65
B	42	01000010	66
C	43	01000011	67
D	44	01000100	68
E	45	01000101	69
F	46	01000110	70
G	47	01000111	71
H	48	01001000	72
I	49	01001001	73
J	4A	01001010	74
K	4B	01001011	75
L	4C	01001100	76
M	4D	01001101	77
N	4E	01001110	78
O	4F	01001111	79
P	50	01010000	80
Q	51	01010001	81
R	52	01010010	82
S	53	01010011	83
T	54	01010100	84
U	55	01010101	85
V	56	01010110	86
W	57	01010111	87
X	58	01011000	88
Y	59	01011001	89
Z	5A	01011010	90
[	5B	01011011	91
\	5C	01011100	92
]	5D	01011101	93
^	5E	01011110	94
_	5F	01011111	95
`	60	01100000	96
a	61	01100001	97
b	62	01100010	98
c	63	01100011	99
d	64	01100100	100
e	65	01100101	101
f	66	01100110	102
g	67	01100111	103
h	68	01101000	104
i	69	01101001	105
j	6A	01101010	106
k	6B	01101011	107
l	6C	01101100	108
m	6D	01101101	109
n	6E	01101110	110
o	6F	01101111	111
p	70	01110000	112
q	71	01110001	113
r	72	01110010	114
s	73	01110011	115
t	74	01110100	116
u	75	01110101	117
v	76	01110110	118
w	77	01110111	119
x	78	01111000	120
y	79	01111001	121
z	7A	01111010	122
{	7B	01111011	123
\|	7C	01111100	124
}	7D	01111101	125
~	7E	01111110	126
DEL	7F	01111111	127