ASCII Table

All 128 ASCII characters with their decimal, hexadecimal, octal and binary codes — control characters, digits, letters and punctuation in one table.

Characters

128

Printable

Bits per character

Control codes

ASCII defines 128 characters with codes 0 to 127 — 95 printable and 33 control characters.

Verified August 6, 2026

ASCII Table — in full

128 of 128 rows

All 128 ASCII codes. Control characters are highlighted.
Dec	Char	Hex	Oct	Binary	Name	Group
0	NUL	0x00	000	0000000	Null	Control
1	SOH	0x01	001	0000001	Start of Heading	Control
2	STX	0x02	002	0000010	Start of Text	Control
3	ETX	0x03	003	0000011	End of Text	Control
4	EOT	0x04	004	0000100	End of Transmission	Control
5	ENQ	0x05	005	0000101	Enquiry	Control
6	ACK	0x06	006	0000110	Acknowledge	Control
7	BEL	0x07	007	0000111	Bell	Control
8	BS	0x08	010	0001000	Backspace	Control
9	HT	0x09	011	0001001	Horizontal Tab	Control
10	LF	0x0A	012	0001010	Line Feed	Control
11	VT	0x0B	013	0001011	Vertical Tab	Control
12	FF	0x0C	014	0001100	Form Feed	Control
13	CR	0x0D	015	0001101	Carriage Return	Control
14	SO	0x0E	016	0001110	Shift Out	Control
15	SI	0x0F	017	0001111	Shift In	Control
16	DLE	0x10	020	0010000	Data Link Escape	Control
17	DC1	0x11	021	0010001	Device Control 1	Control
18	DC2	0x12	022	0010010	Device Control 2	Control
19	DC3	0x13	023	0010011	Device Control 3	Control
20	DC4	0x14	024	0010100	Device Control 4	Control
21	NAK	0x15	025	0010101	Negative Acknowledge	Control
22	SYN	0x16	026	0010110	Synchronous Idle	Control
23	ETB	0x17	027	0010111	End of Transmission Block	Control
24	CAN	0x18	030	0011000	Cancel	Control
25	EM	0x19	031	0011001	End of Medium	Control
26	SUB	0x1A	032	0011010	Substitute	Control
27	ESC	0x1B	033	0011011	Escape	Control
28	FS	0x1C	034	0011100	File Separator	Control
29	GS	0x1D	035	0011101	Group Separator	Control
30	RS	0x1E	036	0011110	Record Separator	Control
31	US	0x1F	037	0011111	Unit Separator	Control
32	(space)	0x20	040	0100000	Space	Space
33	!	0x21	041	0100001	Character “!”	Punctuation & symbols
34	"	0x22	042	0100010	Character “"”	Punctuation & symbols
35	#	0x23	043	0100011	Character “#”	Punctuation & symbols
36	$	0x24	044	0100100	Character “$”	Punctuation & symbols
37	%	0x25	045	0100101	Character “%”	Punctuation & symbols
38	&	0x26	046	0100110	Character “&”	Punctuation & symbols
39	'	0x27	047	0100111	Character “'”	Punctuation & symbols
40	(	0x28	050	0101000	Character “(”	Punctuation & symbols
41	)	0x29	051	0101001	Character “)”	Punctuation & symbols
42	*	0x2A	052	0101010	Character “*”	Punctuation & symbols
43	+	0x2B	053	0101011	Character “+”	Punctuation & symbols
44	,	0x2C	054	0101100	Character “,”	Punctuation & symbols
45	-	0x2D	055	0101101	Character “-”	Punctuation & symbols
46	.	0x2E	056	0101110	Character “.”	Punctuation & symbols
47	/	0x2F	057	0101111	Character “/”	Punctuation & symbols
48	0	0x30	060	0110000	Character “0”	Digits
49	1	0x31	061	0110001	Character “1”	Digits
50	2	0x32	062	0110010	Character “2”	Digits
51	3	0x33	063	0110011	Character “3”	Digits
52	4	0x34	064	0110100	Character “4”	Digits
53	5	0x35	065	0110101	Character “5”	Digits
54	6	0x36	066	0110110	Character “6”	Digits
55	7	0x37	067	0110111	Character “7”	Digits
56	8	0x38	070	0111000	Character “8”	Digits
57	9	0x39	071	0111001	Character “9”	Digits
58	:	0x3A	072	0111010	Character “:”	Punctuation & symbols
59	;	0x3B	073	0111011	Character “;”	Punctuation & symbols
60	<	0x3C	074	0111100	Character “<”	Punctuation & symbols
61	=	0x3D	075	0111101	Character “=”	Punctuation & symbols
62	>	0x3E	076	0111110	Character “>”	Punctuation & symbols
63	?	0x3F	077	0111111	Character “?”	Punctuation & symbols
64	@	0x40	100	1000000	Character “@”	Punctuation & symbols
65	A	0x41	101	1000001	Character “A”	Uppercase
66	B	0x42	102	1000010	Character “B”	Uppercase
67	C	0x43	103	1000011	Character “C”	Uppercase
68	D	0x44	104	1000100	Character “D”	Uppercase
69	E	0x45	105	1000101	Character “E”	Uppercase
70	F	0x46	106	1000110	Character “F”	Uppercase
71	G	0x47	107	1000111	Character “G”	Uppercase
72	H	0x48	110	1001000	Character “H”	Uppercase
73	I	0x49	111	1001001	Character “I”	Uppercase
74	J	0x4A	112	1001010	Character “J”	Uppercase
75	K	0x4B	113	1001011	Character “K”	Uppercase
76	L	0x4C	114	1001100	Character “L”	Uppercase
77	M	0x4D	115	1001101	Character “M”	Uppercase
78	N	0x4E	116	1001110	Character “N”	Uppercase
79	O	0x4F	117	1001111	Character “O”	Uppercase
80	P	0x50	120	1010000	Character “P”	Uppercase
81	Q	0x51	121	1010001	Character “Q”	Uppercase
82	R	0x52	122	1010010	Character “R”	Uppercase
83	S	0x53	123	1010011	Character “S”	Uppercase
84	T	0x54	124	1010100	Character “T”	Uppercase
85	U	0x55	125	1010101	Character “U”	Uppercase
86	V	0x56	126	1010110	Character “V”	Uppercase
87	W	0x57	127	1010111	Character “W”	Uppercase
88	X	0x58	130	1011000	Character “X”	Uppercase
89	Y	0x59	131	1011001	Character “Y”	Uppercase
90	Z	0x5A	132	1011010	Character “Z”	Uppercase
91	[	0x5B	133	1011011	Character “[”	Punctuation & symbols
92	\	0x5C	134	1011100	Character “\”	Punctuation & symbols
93	]	0x5D	135	1011101	Character “]”	Punctuation & symbols
94	^	0x5E	136	1011110	Character “^”	Punctuation & symbols
95	_	0x5F	137	1011111	Character “_”	Punctuation & symbols
96	`	0x60	140	1100000	Character “`”	Punctuation & symbols
97	a	0x61	141	1100001	Character “a”	Lowercase
98	b	0x62	142	1100010	Character “b”	Lowercase
99	c	0x63	143	1100011	Character “c”	Lowercase
100	d	0x64	144	1100100	Character “d”	Lowercase
101	e	0x65	145	1100101	Character “e”	Lowercase
102	f	0x66	146	1100110	Character “f”	Lowercase
103	g	0x67	147	1100111	Character “g”	Lowercase
104	h	0x68	150	1101000	Character “h”	Lowercase
105	i	0x69	151	1101001	Character “i”	Lowercase
106	j	0x6A	152	1101010	Character “j”	Lowercase
107	k	0x6B	153	1101011	Character “k”	Lowercase
108	l	0x6C	154	1101100	Character “l”	Lowercase
109	m	0x6D	155	1101101	Character “m”	Lowercase
110	n	0x6E	156	1101110	Character “n”	Lowercase
111	o	0x6F	157	1101111	Character “o”	Lowercase
112	p	0x70	160	1110000	Character “p”	Lowercase
113	q	0x71	161	1110001	Character “q”	Lowercase
114	r	0x72	162	1110010	Character “r”	Lowercase
115	s	0x73	163	1110011	Character “s”	Lowercase
116	t	0x74	164	1110100	Character “t”	Lowercase
117	u	0x75	165	1110101	Character “u”	Lowercase
118	v	0x76	166	1110110	Character “v”	Lowercase
119	w	0x77	167	1110111	Character “w”	Lowercase
120	x	0x78	170	1111000	Character “x”	Lowercase
121	y	0x79	171	1111001	Character “y”	Lowercase
122	z	0x7A	172	1111010	Character “z”	Lowercase
123	{	0x7B	173	1111011	Character “{”	Punctuation & symbols
124	\|	0x7C	174	1111100	Character “\|”	Punctuation & symbols
125	}	0x7D	175	1111101	Character “}”	Punctuation & symbols
126	~	0x7E	176	1111110	Character “~”	Punctuation & symbols
127	DEL	0x7F	177	1111111	Delete	Control

How to read this table

The “Dec” column is the number a program stores; “Char” is what you see on screen. Every other column is that same number written in a different base.

Control characters (codes 0–31 and 127) have no visible shape. Instead of a glyph they show their official abbreviation, such as LF for line feed.

Upper and lower case sit exactly 32 codes apart, which is why a single bit flips between “A” (65) and “a” (97).

How the 128 slots are spent

Hover the chart to read the precise values.

A quarter of the code space goes to control characters — a legacy of the teleprinters ASCII was designed for in 1963.

Printable characters per 16-code block

Hover the chart to read the precise values.

The first two blocks are entirely control codes; from code 32 on, the code space is printable throughout except for the trailing DEL.

Digits code 127 needs in each base

Hover the chart to read the precise values.

This is why hex is the usual notation for character codes: two digits cover the entire ASCII range.

How this table is built

Computed, not transcribed

Every row is generated from the code point itself: the decimal value is the index, and the hex, octal and binary columns are that same integer rendered in base 16, 8 and 2. Nothing is transcribed by hand.

Sources & verification

Last checked against the sources on August 6, 2026.

Matching calculators

Frequently asked questions

How many characters does ASCII have?

ASCII defines exactly 128 characters with codes 0 to 127. 95 of them are printable; the remaining 33 are control characters.

Why is ASCII 7 bits and not 8?

128 characters need exactly 7 bits (2⁷ = 128). The eighth bit of a byte was originally left free for a parity check. Extensions such as Latin-1 later used it for another 128 characters.

What is the offset between upper and lower case?

Exactly 32. “A” is code 65 and “a” is code 97, which is why programs often switch case by adding or subtracting 32.

Which codes do the digits 0 to 9 use?

The digits are contiguous at 48 to 57, so a digit's numeric value is its code minus 48.

Is ASCII still relevant now that Unicode exists?

Yes. The first 128 Unicode code points are identical to ASCII, and UTF-8 encodes them as a single byte, so any ASCII text is automatically valid UTF-8.

Why does DEL sit at the end instead of with the other control codes?

On punched tape you deleted a character by punching all seven bits, which produces code 127. That is why DEL sits at the top of the table rather than with codes 0 to 31.

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ASCII Table

All 128 ASCII characters with their decimal, hexadecimal, octal and binary codes — control characters, digits, letters and punctuation in one table.

Characters

128

Printable

Bits per character

Control codes

ASCII defines 128 characters with codes 0 to 127 — 95 printable and 33 control characters.

Verified August 6, 2026

ASCII Table — in full

128 of 128 rows

All 128 ASCII codes. Control characters are highlighted.
Dec	Char	Hex	Oct	Binary	Name	Group
0	NUL	0x00	000	0000000	Null	Control
1	SOH	0x01	001	0000001	Start of Heading	Control
2	STX	0x02	002	0000010	Start of Text	Control
3	ETX	0x03	003	0000011	End of Text	Control
4	EOT	0x04	004	0000100	End of Transmission	Control
5	ENQ	0x05	005	0000101	Enquiry	Control
6	ACK	0x06	006	0000110	Acknowledge	Control
7	BEL	0x07	007	0000111	Bell	Control
8	BS	0x08	010	0001000	Backspace	Control
9	HT	0x09	011	0001001	Horizontal Tab	Control
10	LF	0x0A	012	0001010	Line Feed	Control
11	VT	0x0B	013	0001011	Vertical Tab	Control
12	FF	0x0C	014	0001100	Form Feed	Control
13	CR	0x0D	015	0001101	Carriage Return	Control
14	SO	0x0E	016	0001110	Shift Out	Control
15	SI	0x0F	017	0001111	Shift In	Control
16	DLE	0x10	020	0010000	Data Link Escape	Control
17	DC1	0x11	021	0010001	Device Control 1	Control
18	DC2	0x12	022	0010010	Device Control 2	Control
19	DC3	0x13	023	0010011	Device Control 3	Control
20	DC4	0x14	024	0010100	Device Control 4	Control
21	NAK	0x15	025	0010101	Negative Acknowledge	Control
22	SYN	0x16	026	0010110	Synchronous Idle	Control
23	ETB	0x17	027	0010111	End of Transmission Block	Control
24	CAN	0x18	030	0011000	Cancel	Control
25	EM	0x19	031	0011001	End of Medium	Control
26	SUB	0x1A	032	0011010	Substitute	Control
27	ESC	0x1B	033	0011011	Escape	Control
28	FS	0x1C	034	0011100	File Separator	Control
29	GS	0x1D	035	0011101	Group Separator	Control
30	RS	0x1E	036	0011110	Record Separator	Control
31	US	0x1F	037	0011111	Unit Separator	Control
32	(space)	0x20	040	0100000	Space	Space
33	!	0x21	041	0100001	Character “!”	Punctuation & symbols
34	"	0x22	042	0100010	Character “"”	Punctuation & symbols
35	#	0x23	043	0100011	Character “#”	Punctuation & symbols
36	$	0x24	044	0100100	Character “$”	Punctuation & symbols
37	%	0x25	045	0100101	Character “%”	Punctuation & symbols
38	&	0x26	046	0100110	Character “&”	Punctuation & symbols
39	'	0x27	047	0100111	Character “'”	Punctuation & symbols
40	(	0x28	050	0101000	Character “(”	Punctuation & symbols
41	)	0x29	051	0101001	Character “)”	Punctuation & symbols
42	*	0x2A	052	0101010	Character “*”	Punctuation & symbols
43	+	0x2B	053	0101011	Character “+”	Punctuation & symbols
44	,	0x2C	054	0101100	Character “,”	Punctuation & symbols
45	-	0x2D	055	0101101	Character “-”	Punctuation & symbols
46	.	0x2E	056	0101110	Character “.”	Punctuation & symbols
47	/	0x2F	057	0101111	Character “/”	Punctuation & symbols
48	0	0x30	060	0110000	Character “0”	Digits
49	1	0x31	061	0110001	Character “1”	Digits
50	2	0x32	062	0110010	Character “2”	Digits
51	3	0x33	063	0110011	Character “3”	Digits
52	4	0x34	064	0110100	Character “4”	Digits
53	5	0x35	065	0110101	Character “5”	Digits
54	6	0x36	066	0110110	Character “6”	Digits
55	7	0x37	067	0110111	Character “7”	Digits
56	8	0x38	070	0111000	Character “8”	Digits
57	9	0x39	071	0111001	Character “9”	Digits
58	:	0x3A	072	0111010	Character “:”	Punctuation & symbols
59	;	0x3B	073	0111011	Character “;”	Punctuation & symbols
60	<	0x3C	074	0111100	Character “<”	Punctuation & symbols
61	=	0x3D	075	0111101	Character “=”	Punctuation & symbols
62	>	0x3E	076	0111110	Character “>”	Punctuation & symbols
63	?	0x3F	077	0111111	Character “?”	Punctuation & symbols
64	@	0x40	100	1000000	Character “@”	Punctuation & symbols
65	A	0x41	101	1000001	Character “A”	Uppercase
66	B	0x42	102	1000010	Character “B”	Uppercase
67	C	0x43	103	1000011	Character “C”	Uppercase
68	D	0x44	104	1000100	Character “D”	Uppercase
69	E	0x45	105	1000101	Character “E”	Uppercase
70	F	0x46	106	1000110	Character “F”	Uppercase
71	G	0x47	107	1000111	Character “G”	Uppercase
72	H	0x48	110	1001000	Character “H”	Uppercase
73	I	0x49	111	1001001	Character “I”	Uppercase
74	J	0x4A	112	1001010	Character “J”	Uppercase
75	K	0x4B	113	1001011	Character “K”	Uppercase
76	L	0x4C	114	1001100	Character “L”	Uppercase
77	M	0x4D	115	1001101	Character “M”	Uppercase
78	N	0x4E	116	1001110	Character “N”	Uppercase
79	O	0x4F	117	1001111	Character “O”	Uppercase
80	P	0x50	120	1010000	Character “P”	Uppercase
81	Q	0x51	121	1010001	Character “Q”	Uppercase
82	R	0x52	122	1010010	Character “R”	Uppercase
83	S	0x53	123	1010011	Character “S”	Uppercase
84	T	0x54	124	1010100	Character “T”	Uppercase
85	U	0x55	125	1010101	Character “U”	Uppercase
86	V	0x56	126	1010110	Character “V”	Uppercase
87	W	0x57	127	1010111	Character “W”	Uppercase
88	X	0x58	130	1011000	Character “X”	Uppercase
89	Y	0x59	131	1011001	Character “Y”	Uppercase
90	Z	0x5A	132	1011010	Character “Z”	Uppercase
91	[	0x5B	133	1011011	Character “[”	Punctuation & symbols
92	\	0x5C	134	1011100	Character “\”	Punctuation & symbols
93	]	0x5D	135	1011101	Character “]”	Punctuation & symbols
94	^	0x5E	136	1011110	Character “^”	Punctuation & symbols
95	_	0x5F	137	1011111	Character “_”	Punctuation & symbols
96	`	0x60	140	1100000	Character “`”	Punctuation & symbols
97	a	0x61	141	1100001	Character “a”	Lowercase
98	b	0x62	142	1100010	Character “b”	Lowercase
99	c	0x63	143	1100011	Character “c”	Lowercase
100	d	0x64	144	1100100	Character “d”	Lowercase
101	e	0x65	145	1100101	Character “e”	Lowercase
102	f	0x66	146	1100110	Character “f”	Lowercase
103	g	0x67	147	1100111	Character “g”	Lowercase
104	h	0x68	150	1101000	Character “h”	Lowercase
105	i	0x69	151	1101001	Character “i”	Lowercase
106	j	0x6A	152	1101010	Character “j”	Lowercase
107	k	0x6B	153	1101011	Character “k”	Lowercase
108	l	0x6C	154	1101100	Character “l”	Lowercase
109	m	0x6D	155	1101101	Character “m”	Lowercase
110	n	0x6E	156	1101110	Character “n”	Lowercase
111	o	0x6F	157	1101111	Character “o”	Lowercase
112	p	0x70	160	1110000	Character “p”	Lowercase
113	q	0x71	161	1110001	Character “q”	Lowercase
114	r	0x72	162	1110010	Character “r”	Lowercase
115	s	0x73	163	1110011	Character “s”	Lowercase
116	t	0x74	164	1110100	Character “t”	Lowercase
117	u	0x75	165	1110101	Character “u”	Lowercase
118	v	0x76	166	1110110	Character “v”	Lowercase
119	w	0x77	167	1110111	Character “w”	Lowercase
120	x	0x78	170	1111000	Character “x”	Lowercase
121	y	0x79	171	1111001	Character “y”	Lowercase
122	z	0x7A	172	1111010	Character “z”	Lowercase
123	{	0x7B	173	1111011	Character “{”	Punctuation & symbols
124	\|	0x7C	174	1111100	Character “\|”	Punctuation & symbols
125	}	0x7D	175	1111101	Character “}”	Punctuation & symbols
126	~	0x7E	176	1111110	Character “~”	Punctuation & symbols
127	DEL	0x7F	177	1111111	Delete	Control

How to read this table

The “Dec” column is the number a program stores; “Char” is what you see on screen. Every other column is that same number written in a different base.

Control characters (codes 0–31 and 127) have no visible shape. Instead of a glyph they show their official abbreviation, such as LF for line feed.

Upper and lower case sit exactly 32 codes apart, which is why a single bit flips between “A” (65) and “a” (97).

Frequently asked questions

How many characters does ASCII have?

ASCII defines exactly 128 characters with codes 0 to 127. 95 of them are printable; the remaining 33 are control characters.

Why is ASCII 7 bits and not 8?

128 characters need exactly 7 bits (2⁷ = 128). The eighth bit of a byte was originally left free for a parity check. Extensions such as Latin-1 later used it for another 128 characters.

What is the offset between upper and lower case?

Exactly 32. “A” is code 65 and “a” is code 97, which is why programs often switch case by adding or subtracting 32.

Which codes do the digits 0 to 9 use?

The digits are contiguous at 48 to 57, so a digit's numeric value is its code minus 48.

Is ASCII still relevant now that Unicode exists?

Yes. The first 128 Unicode code points are identical to ASCII, and UTF-8 encodes them as a single byte, so any ASCII text is automatically valid UTF-8.

Why does DEL sit at the end instead of with the other control codes?

On punched tape you deleted a character by punching all seven bits, which produces code 127. That is why DEL sits at the top of the table rather than with codes 0 to 31.

ASCII Table

ASCII Table — in full

How to read this table

How the 128 slots are spent

Printable characters per 16-code block

Digits code 127 needs in each base

How this table is built

Sources & verification

Matching calculators

Number Base Converter

Number Bases

Data Storage Conversions

More reference tables

Powers of 2 Table

SI Unit Prefixes

Multiplication Table

Squares, Cubes and Roots Table

Prime Numbers Table

Trigonometry Table

Frequently asked questions

Browse every reference table

ASCII Table

ASCII Table — in full

How to read this table

How the 128 slots are spent

Printable characters per 16-code block

Digits code 127 needs in each base

How this table is built

Sources & verification

Matching calculators

Number Base Converter

Number Bases

Data Storage Conversions

More reference tables

Powers of 2 Table

SI Unit Prefixes

Multiplication Table

Squares, Cubes and Roots Table

Prime Numbers Table

Trigonometry Table

Frequently asked questions

Browse every reference table