ASCII Binary Table

The ASCII table assigns a number from 0 to 127 to every basic character, and each number has an 8-bit binary form. For example, A is 65 (01000001), a is 97 (01100001), and 0 is 48 (00110000).

By Matt Dean · Last updated November 8, 2026 · How we test our converters

Use this table to look up the decimal, hexadecimal and binary code of any ASCII character. To convert whole messages, use the text to binary converter or the binary to ASCII converter.

Printable characters (32 to 126)

Decimal	Hex	Binary	Character
32	20	00100000	Space
33	21	00100001	!
34	22	00100010	"
35	23	00100011	#
36	24	00100100	$
37	25	00100101	%
38	26	00100110	&
39	27	00100111	'
40	28	00101000	(
41	29	00101001	)
42	2A	00101010	*
43	2B	00101011	+
44	2C	00101100	,
45	2D	00101101	-
46	2E	00101110	.
47	2F	00101111	/
48	30	00110000	0
49	31	00110001	1
50	32	00110010	2
51	33	00110011	3
52	34	00110100	4
53	35	00110101	5
54	36	00110110	6
55	37	00110111	7
56	38	00111000	8
57	39	00111001	9
58	3A	00111010	:
59	3B	00111011	;
60	3C	00111100	<
61	3D	00111101	=
62	3E	00111110	>
63	3F	00111111	?
64	40	01000000	@
65	41	01000001	A
66	42	01000010	B
67	43	01000011	C
68	44	01000100	D
69	45	01000101	E
70	46	01000110	F
71	47	01000111	G
72	48	01001000	H
73	49	01001001	I
74	4A	01001010	J
75	4B	01001011	K
76	4C	01001100	L
77	4D	01001101	M
78	4E	01001110	N
79	4F	01001111	O
80	50	01010000	P
81	51	01010001	Q
82	52	01010010	R
83	53	01010011	S
84	54	01010100	T
85	55	01010101	U
86	56	01010110	V
87	57	01010111	W
88	58	01011000	X
89	59	01011001	Y
90	5A	01011010	Z
91	5B	01011011	[
92	5C	01011100	\
93	5D	01011101	]
94	5E	01011110	^
95	5F	01011111	_
96	60	01100000	`
97	61	01100001	a
98	62	01100010	b
99	63	01100011	c
100	64	01100100	d
101	65	01100101	e
102	66	01100110	f
103	67	01100111	g
104	68	01101000	h
105	69	01101001	i
106	6A	01101010	j
107	6B	01101011	k
108	6C	01101100	l
109	6D	01101101	m
110	6E	01101110	n
111	6F	01101111	o
112	70	01110000	p
113	71	01110001	q
114	72	01110010	r
115	73	01110011	s
116	74	01110100	t
117	75	01110101	u
118	76	01110110	v
119	77	01110111	w
120	78	01111000	x
121	79	01111001	y
122	7A	01111010	z
123	7B	01111011	{
124	7C	01111100	|
125	7D	01111101	}
126	7E	01111110	~

Control characters (0 to 31 and 127)

These are non-printing codes from the teletype era. A few are still used every day: TAB (9), LF line feed (10) and CR carriage return (13).

Decimal	Hex	Binary	Name
0	00	00000000	NUL
1	01	00000001	SOH
2	02	00000010	STX
3	03	00000011	ETX
4	04	00000100	EOT
5	05	00000101	ENQ
6	06	00000110	ACK
7	07	00000111	BEL
8	08	00001000	BS
9	09	00001001	TAB
10	0A	00001010	LF
11	0B	00001011	VT
12	0C	00001100	FF
13	0D	00001101	CR
14	0E	00001110	SO
15	0F	00001111	SI
16	10	00010000	DLE
17	11	00010001	DC1
18	12	00010010	DC2
19	13	00010011	DC3
20	14	00010100	DC4
21	15	00010101	NAK
22	16	00010110	SYN
23	17	00010111	ETB
24	18	00011000	CAN
25	19	00011001	EM
26	1A	00011010	SUB
27	1B	00011011	ESC
28	1C	00011100	FS
29	1D	00011101	GS
30	1E	00011110	RS
31	1F	00011111	US
127	7F	01111111	DEL

Patterns worth knowing

• Digits 0 to 9 are 48 to 57. The binary starts 0011, so the low four bits are the digit itself.
• Uppercase letters start at 65 (01000001) and lowercase at 97 (01100001). They differ by exactly 32, which is one bit.
• Space is 32 (00100000).
• Every ASCII code fits in 7 bits; the eighth bit is 0 in a standard byte.

ASCII table FAQ

How many characters are in ASCII?

128 characters, numbered 0 to 127.

What is extended ASCII?

Various 8-bit extensions add characters 128 to 255, but they differ between systems. UTF-8 is the modern standard and matches ASCII for the first 128 codes.

What is the binary code for the letter A?

01000001 (decimal 65).

How do I print the table?

Use your browser’s print function; the table is plain text and prints cleanly.