This is a conversion table with decimal numbers next to their binary and hex equivalents. The matching ASCII characters are listed as well, with a more elaborate descriptions of some characters on this page. If none of these words mean anything to you, jump to the bottom of this page for more information on:

ASCII codes 0 to 127

Nr	Binary	Hex	ASCII	Description
0	00000000	0h		null
1	00000001	1h		start of heading
2	00000010	2h		start of text
3	00000011	3h		end of text
4	00000100	4h		end of transmission
5	00000101	5h		enquiry
6	00000110	6h		acknowledge
7	00000111	7h		bell
8	00001000	8h		backspace
9	00001001	9h		horizontal tab
10	00001010	Ah		line feed
11	00001011	Bh		vertical tab
12	00001100	Ch		form feed
13	00001101	Dh		carriage return
14	00001110	Eh		shift out
15	00001111	Fh		shift in
16	00010000	10h		data link escape
17	00010001	11h		device control 1
18	00010010	12h		device control 2
19	00010011	13h		device control 3
20	00010100	14h		device control 4
21	00010101	15h		negative acknowledge
22	00010110	16h		synchronous idle
23	00010111	17h		end of block
24	00011000	18h		cancel
25	00011001	19h		end of medium
26	00011010	1Ah		substitute
27	00011011	1Bh		escape
28	00011100	1Ch		file separator
29	00011101	1Dh		group separator
30	00011110	1Eh		record separator
31	00011111	1Fh		unit separator
32	00100000	20h		space
33	00100001	21h	!	exclamation mark
34	00100010	22h	“	double quotes
35	00100011	23h	#	number sign or hash tag
36	00100100	24h	$	dollar sign
37	00100101	25h	%	percent sign
38	00100110	26h	&	ampersand
39	00100111	27h	‘	single quote
40	00101000	28h	(	left parenthesis
41	00101001	29h	)	right parenthesis
42	00101010	2Ah	*	asterisk
43	00101011	2Bh	+	plus sign
44	00101100	2Ch	,	comma
45	00101101	2Dh	–	hyphen or minus sign
46	00101110	2Eh	.	period
47	00101111	2Fh	/	slash
48	00110000	30h	0	zero
49	00110001	31h	1	one
50	00110010	32h	2	two
51	00110011	33h	3	three
52	00110100	34h	4	four
53	00110101	35h	5	five
54	00110110	36h	6	six
55	00110111	37h	7	seven
56	00111000	38h	8	eight
57	00111001	39h	9	nine
58	00111010	3Ah	:	colon
59	00111011	3Bh	;	semicolon/td>
60	00111100	3Ch	<	less than sign
61	00111101	3Dh	=	equal sign
62	00111110	3Eh	>	greater than sign
63	00111111	3Fh	?	question mark
64	01000000	40h	@	at symbol
65	01000001	41h	A	capital a
66	01000010	42h	B	capital b
67	01000011	43h	C	capital c
68	01000100	44h	D	capital d
69	01000101	45h	E	capital e
70	01000110	46h	F	capital f
71	01000111	47h	G	capital g
72	01001000	48h	H	capital h
73	01001001	49h	I	capital i
74	01001010	4Ah	J	capital j
75	01001011	4Bh	K	capital k
76	01001100	4Ch	L	capital l
77	01001101	4Dh	M	capital m
78	01001110	4Eh	N	capital n
79	01001111	4Fh	O	capital o
80	01010000	50h	P	capital p
81	01010001	51h	Q	capital q
82	01010010	52h	R	capital r
83	01010011	53h	S	capital s
84	01010100	54h	T	capital t
85	01010101	55h	U	capital u
86	01010110	56h	V	capital v
87	01010111	57h	W	capital w
88	01011000	58h	X	capital x
89	01011001	59h	Y	capital y
90	01011010	5Ah	Z	capital z
91	01011011	5Bh	[	left bracket
92	01011100	5Ch	\	backslash
93	01011101	5Dh	]	right bracket
94	01011110	5Eh	^	caret or circumflex
95	01011111	5Fh	_	underscore
96	01100000	60h	`	grave accent
97	01100001	61h	a	lowercase a
98	01100010	62h	b	lowercase b
99	01100011	63h	c	lowercase c
100	01100100	64h	d	lowercase d
101	01100101	65h	e	lowercase e
102	01100110	66h	f	lowercase f
103	01100111	67h	g	lowercase g
104	01101000	68h	h	lowercase h
105	01101001	69h	i	lowercase i
106	01101010	6Ah	j	lowercase j
107	01101011	6Bh	k	lowercase k
108	01101100	6Ch	l	lowercase l
109	01101101	6Dh	m	lowercase m
110	01101110	6Eh	n	lowercase n
111	01101111	6Fh	o	lowercase o
112	01110000	70h	p	lowercase p
113	01110001	71h	q	lowercase q
114	01110010	72h	r	lowercase r
115	01110011	73h	s	lowercase s
116	01110100	74h	t	lowercase t
117	01110101	75h	u	lowercase u
118	01110110	76h	v	lowercase v
119	01110111	77h	w	lowercase w
120	01111000	78h	x	lowercase x
121	01111001	79h	y	lowercase y
122	01111010	7Ah	z	lowercase z
123	01111011	7Bh	{	left brace
124	01111100	7Ch	|	bar
125	01111101	7Dh	}	right brace
126	01111110	7Eh	~	tilde or equivalency sign
127	01111111	7Fh		DEL

 

Extended ASCII codes

Below are the extended ASCII codes for character codes 128 to 255. This table uses the ISO 8859-1 or ISO Latin-1 encoding. Codes 128-159 contain the Microsoft Windows Latin-1 extended characters. Other variations exist but this is the most commonly used set of character codes.

Nr	Binary	Hex	ASCII	Description
128	10000000	80h	€	euro sign
129	10000001	81h
130	10000010	82h	‚	single low-9 quotation mark
131	10000011	83h	ƒ	lowercase f with hook
132	10000100	84h	„	double low-9 quotation mark
133	10000101	85h	…	horizontal ellipsis
134	10000110	86h	†	dagger
135	10000111	87h	‡	double dagger
136	10001000	88h	ˆ	circumflex accent
137	10001001	89h	‰	per mille sign
138	10001010	8Ah	Š	uppercase s with caron
139	10001011	8Bh	‹	single left-pointing angle quotation
140	10001100	8Ch	Œ	OE ligature
141	10001101	8Dh
142	10001110	8Eh	Ž	uppercase z with caron
143	10001111	8Fh
144	10010000	90h
145	10010001	91h	‘	left single quotation mark
146	10010010	92h	’	right single quotation mark
147	10010011	93h	“	left double quotation mark
148	10010100	94h	”	right double quotation mark
149	10010101	95h	•	bullet
150	10010110	96h	–	en dash
151	10010111	97h	—	em dash
152	10011000	98h	˜	small tilde
153	10011001	99h	™	trade mark sign
154	10011010	9Ah	š	lowercase s with caron
155	10011011	9Bh	›	Single right-pointing angle quotation mark
156	10011100	9Ch	œ	lowercase oe ligature
157	10011101	9Dh
158	10011110	9Eh	ž	lowercase z with caron
159	10011111	9Fh	Ÿ	capital y with diaeresis
160	10100000	A0h		non-breaking space
161	10100001	A1h	¡	inverted exclamation mark
162	10100010	A2h	¢	cent sign
163	10100011	A3h	£	pound sign
164	10100100	A4h	¤	currency sign
165	10100101	A5h	¥	yen sign
166	10100110	A6h	¦	broken vertical bar
167	10100111	A7h	§	section sign
168	10101000	A8h	¨	umlaut
169	10101001	A9h	©	copyright sign
170	10101010	AAh	ª	feminine ordinal indicator
171	10101011	ABh	«	left double angle quotes
172	10101100	ACh	¬	not sign
173	10101101	ADh	­	soft hyphen
174	10101110	AEh	®	registered trademark sign
175	10101111	AFh	¯	overline
176	10110000	B0h	°	degree sign
177	10110001	B1h	±	plus-or-minus sign
178	10110010	B2h	²	2 cubed
179	10110011	B3h	³	3 cubed
180	10110100	B4h	´	acute accent
181	10110101	B5h	µ	micro sign
182	10110110	B6h	¶	pilcrow sign
183	10110111	B7h	·	middle dot
184	10111000	B8h	¸	cedilla
185	10111001	B9h	¹	superscript one
186	10111010	BAh	º	masculine ordinal indicator
187	10111011	BBh	»	right double angle quotes
188	10111100	BCh	¼	fraction one quarter
189	10111101	BDh	½	fraction one-half
190	10111110	BEh	¾	fraction three-quarters
191	10111111	BFh	¿	inverted question mark
192	11000000	C0h	À	capital a with grave
193	11000001	C1h	Á	capital a with acute
194	11000010	C2h	Â	capital a with circumflex
195	11000011	C3h	Ã	capital a with tilde
196	11000100	C4h	Ä	capital a with diaeresis
197	11000101	C5h	Å	capital a with ring above
198	11000110	C6h	Æ	capital AE
199	11000111	C7h	Ç	capital c with cedilla
200	11001000	C8h	È	capital e with grave
201	11001001	C9h	É	capital e with acute
202	11001010	CAh	Ê	capital e with circumflex
203	11001011	CBh	Ë	capital e with diaeresis
204	11001100	CCh	Ì	capital i with grave
205	11001101	CDh	Í	capital i with acute
206	11001110	CEh	Î	capital i with circumflex
207	11001111	CFh	Ï	capital i with diaeresis
208	11010000	D0h	Ð	capital eth
209	11010001	D1h	Ñ	capital n with circumflex
210	11010010	D2h	Ò	capital o with circumflex
211	11010011	D3h	Ó	capital o with acute/td>
212	11010100	D4h	Ô	capital o with circumflex
213	11010101	D5h	Õ	capital o with tilde
214	11010110	D6h	Ö	capital o with diaeresis
215	11010111	D7h	×	multiplication sign
216	11011000	D8h	Ø	capital o with slash
217	11011001	D9h	Ù	capital u with grave
218	11011010	DAh	Ú	capital u with acute
219	11011011	DBh	Û	capital u with circumflex
220	11011100	DCh	Ü	capital u with diaeresis
221	11011101	DDh	Ý	capital y with acute
222	11011110	DEh	Þ	capital thorn
223	11011111	DFh	ß	lowercase ess-zed
224	11100000	E0h	à	lowercase a with grave
225	11100001	E1h	á	lowercase a with acute
226	11100010	E2h	â	lowercase a with circumflex
227	11100011	E3h	ã	lowercase a with tilde
228	11100100	E4h	ä	lowercase a with diaeresis
229	11100101	E5h	å	lowercase a with ring above
230	11100110	E6h	æ	lowercase ae
231	11100111	E7h	ç	lowercase c with cedilla
232	11101000	E8h	è	lowercase e with grave
233	11101001	E9h	é	lowercase e with acute
234	11101010	EAh	ê	lowercase e with circumflex
235	11101011	EBh	ë	lowercase e with diaeresis
236	11101100	ECh	ì	lowercase e with grave
237	11101101	EDh	í	lowercase i with acute
238	11101110	EEh	î	lowercase i with circumflex
239	11101111	EFh	ï	lowercase i with diaeresis
240	11110000	F0h	ð	lowercase eth
241	11110001	F1h	ñ	lowercase n with tilde
242	11110010	F2h	ò	lowercase o with grave
243	11110011	F3h	ó	lowercase o with acute
244	11110100	F4h	ô	lowercase o with circumflex
245	11110101	F5h	õ	lowercase o with tilde
246	11110110	F6h	ö	lowercase o with diaeresis
247	11110111	F7h	÷	division sign
248	11111000	F8h	ø	lowercase o with slash
249	11111001	F9h	ù	lowercase u with grave
250	11111010	FAh	ú	lowercase u with acute
251	11111011	FBh	û	lowercase u with circumflex
252	11111100	FCh	ü	lowercase u with diaeresis
253	11111101	FDh	ý	lowercase y with acute
254	11111110	FEh	þ	lowercase thorn
255	11111111	FFh	ÿ	lowercase y with diaeresis

 

Binary numbers

A computer number system that consists of 2 numerals, 0 and 1. It is sometimes called base-2.
Since computers do not have 10 fingers, all the counting within the computer itself is done using only 2 numerals: 0 and 1 (or “on” and “off” or “false” and “true”).

Hexadecimal numbers

The hexadecimal system (hex for short) uses numbers from 0 to 15. It starts off like the decimal system: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 but then comes A which equals 10 and then B, C, D, E and F (which of course equals 15). The next number is 10 which is actually 16 in decimal and so on….
Because it can be impossible to distinguish between a hex and a decimal number (is that ’25’ a decimal 25 or is it 25 in hex which equals 37 decimal?) it is customary to put a lowercase ‘h’ after each hex number. So 25 is a decimal number and 25h is a hex one.

ASCII

ASCII stands for American Standard Code for Information Interchange. It is a standard that was defined in 1963 to allow computers to exchange information, regardless of the manufacturer.

• Since computers basically work numbers based, the ASCII character set consists of 128 decimal numbers, ranging from 0 through 127, assigned to letters, numbers, punctuation marks and the most common special characters. Since a computer needs 7 bits to represent the numbers 0 to 127, these codes are sometimes referred to as 7-bit ASCII.
  • Numbers 0 to 31 are used for control codes – special instructions such as indicating that the computer should make a sound (ASCII code 7) or the printer should start from a new sheet of paper (ASCII code 12).
  • ASCII codes 32 to 47 are used for special characters, starting with the space character.
  • After the numbers 0 to 9 (ASCII codes 48 to 57) you once again get some special characters, from the colon to the @ symbol.
  • The letters start with the capital A from ASCII code 65 onwards. The lowercase a to z characters take up ASCII codes 97 to 122. You may wonder why the lowercase characters don’t simply follow their capital brethren. Remember: this is ASCII, this is computer stuff from the dark ages. If you take a capital U, which is ASCII code 85, and add 32 to that code, you get character code 117, which is the lowercase u. 32 is the magic ‘distance’ between any upper and lower case character and 32 is a truly magical, efficient number that any computer or nerd can relate to. Even I love 32.
  • Codes 123 to 127 are once again special characters, including the tilde (~).
• All computer systems also use numbers 128 through 255 to represent additional characters, but this list is not really universally standardized. That is why the above table is split up in two parts. The first table with the 7-bit ASCII codes is universal across all computers. The second extended ASCII table is not – it is what current Windows machines use.
• Because 256 characters are not sufficient to represent all characters used in Asian languages and to solve the annoying compatibility problems with different codes being used for codes 128 to 255, a new standard has emerged. The Unicode character set contains more than 32000 characters.