What is the ASCII code for A?

65 in decimal, 41 in hex and 01000001 in binary. Lowercase a is 97.

How many ASCII characters are there?

128, numbered 0 to 127: 33 control characters and 95 printable ones, including the space.

Is extended ASCII the same everywhere?

No. Codes 128–255 depend on the code page. This table uses Windows-1252, which is what most people mean by extended ASCII. In UTF-8, these characters take 2 bytes.

ASCII Table – Codes in Decimal, Hex & Binary

Extended (128–255)

Text to ASCII

Dec	Hex	Oct	Binary	Char	HTML	Description
0	`00`	`000`	`00000000`	NUL	``	Null
1	`01`	`001`	`00000001`	SOH	``	Start of heading
2	`02`	`002`	`00000010`	STX	``	Start of text
3	`03`	`003`	`00000011`	ETX	``	End of text
4	`04`	`004`	`00000100`	EOT	``	End of transmission
5	`05`	`005`	`00000101`	ENQ	``	Enquiry
6	`06`	`006`	`00000110`	ACK	``	Acknowledge
7	`07`	`007`	`00000111`	BEL	``	Bell
8	`08`	`010`	`00001000`	BS	``	Backspace
9	`09`	`011`	`00001001`	HT	` `	Horizontal tab
10	`0A`	`012`	`00001010`	LF	` `	Line feed (new line)
11	`0B`	`013`	`00001011`	VT	``	Vertical tab
12	`0C`	`014`	`00001100`	FF	``	Form feed
13	`0D`	`015`	`00001101`	CR	` `	Carriage return
14	`0E`	`016`	`00001110`	SO	``	Shift out
15	`0F`	`017`	`00001111`	SI	``	Shift in
16	`10`	`020`	`00010000`	DLE	``	Data link escape
17	`11`	`021`	`00010001`	DC1	``	Device control 1 (XON)
18	`12`	`022`	`00010010`	DC2	``	Device control 2
19	`13`	`023`	`00010011`	DC3	``	Device control 3 (XOFF)
20	`14`	`024`	`00010100`	DC4	``	Device control 4
21	`15`	`025`	`00010101`	NAK	``	Negative acknowledge
22	`16`	`026`	`00010110`	SYN	``	Synchronous idle
23	`17`	`027`	`00010111`	ETB	``	End of transmission block
24	`18`	`030`	`00011000`	CAN	``	Cancel
25	`19`	`031`	`00011001`	EM	``	End of medium
26	`1A`	`032`	`00011010`	SUB	``	Substitute
27	`1B`	`033`	`00011011`	ESC	``	Escape
28	`1C`	`034`	`00011100`	FS	``	File separator
29	`1D`	`035`	`00011101`	GS	``	Group separator
30	`1E`	`036`	`00011110`	RS	``	Record separator
31	`1F`	`037`	`00011111`	US	``	Unit separator
32	`20`	`040`	`00100000`	SP	` `	Space
33	`21`	`041`	`00100001`	!	`!`	Exclamation mark
34	`22`	`042`	`00100010`	"	`"`	Double quote
35	`23`	`043`	`00100011`	#	`#`	Number sign (hash)
36	`24`	`044`	`00100100`	$	`$`	Dollar sign
37	`25`	`045`	`00100101`	%	`%`	Percent sign
38	`26`	`046`	`00100110`	&	`&`	Ampersand
39	`27`	`047`	`00100111`	'	`'`	Single quote (apostrophe)
40	`28`	`050`	`00101000`	(	`(`	Left parenthesis
41	`29`	`051`	`00101001`	)	`)`	Right parenthesis
42	`2A`	`052`	`00101010`	*	`*`	Asterisk
43	`2B`	`053`	`00101011`	+	`+`	Plus sign
44	`2C`	`054`	`00101100`	,	`,`	Comma
45	`2D`	`055`	`00101101`	-	`-`	Hyphen-minus
46	`2E`	`056`	`00101110`	.	`.`	Period (full stop)
47	`2F`	`057`	`00101111`	/	`/`	Slash
48	`30`	`060`	`00110000`	0	`0`	Digit 0
49	`31`	`061`	`00110001`	1	`1`	Digit 1
50	`32`	`062`	`00110010`	2	`2`	Digit 2
51	`33`	`063`	`00110011`	3	`3`	Digit 3
52	`34`	`064`	`00110100`	4	`4`	Digit 4
53	`35`	`065`	`00110101`	5	`5`	Digit 5
54	`36`	`066`	`00110110`	6	`6`	Digit 6
55	`37`	`067`	`00110111`	7	`7`	Digit 7
56	`38`	`070`	`00111000`	8	`8`	Digit 8
57	`39`	`071`	`00111001`	9	`9`	Digit 9
58	`3A`	`072`	`00111010`	:	`:`	Colon
59	`3B`	`073`	`00111011`	;	`;`	Semicolon
60	`3C`	`074`	`00111100`	<	`<`	Less-than sign
61	`3D`	`075`	`00111101`	=	`=`	Equals sign
62	`3E`	`076`	`00111110`	>	`>`	Greater-than sign
63	`3F`	`077`	`00111111`	?	`?`	Question mark
64	`40`	`100`	`01000000`	@	`@`	At sign
65	`41`	`101`	`01000001`	A	`A`	Uppercase A
66	`42`	`102`	`01000010`	B	`B`	Uppercase B
67	`43`	`103`	`01000011`	C	`C`	Uppercase C
68	`44`	`104`	`01000100`	D	`D`	Uppercase D
69	`45`	`105`	`01000101`	E	`E`	Uppercase E
70	`46`	`106`	`01000110`	F	`F`	Uppercase F
71	`47`	`107`	`01000111`	G	`G`	Uppercase G
72	`48`	`110`	`01001000`	H	`H`	Uppercase H
73	`49`	`111`	`01001001`	I	`I`	Uppercase I
74	`4A`	`112`	`01001010`	J	`J`	Uppercase J
75	`4B`	`113`	`01001011`	K	`K`	Uppercase K
76	`4C`	`114`	`01001100`	L	`L`	Uppercase L
77	`4D`	`115`	`01001101`	M	`M`	Uppercase M
78	`4E`	`116`	`01001110`	N	`N`	Uppercase N
79	`4F`	`117`	`01001111`	O	`O`	Uppercase O
80	`50`	`120`	`01010000`	P	`P`	Uppercase P
81	`51`	`121`	`01010001`	Q	`Q`	Uppercase Q
82	`52`	`122`	`01010010`	R	`R`	Uppercase R
83	`53`	`123`	`01010011`	S	`S`	Uppercase S
84	`54`	`124`	`01010100`	T	`T`	Uppercase T
85	`55`	`125`	`01010101`	U	`U`	Uppercase U
86	`56`	`126`	`01010110`	V	`V`	Uppercase V
87	`57`	`127`	`01010111`	W	`W`	Uppercase W
88	`58`	`130`	`01011000`	X	`X`	Uppercase X
89	`59`	`131`	`01011001`	Y	`Y`	Uppercase Y
90	`5A`	`132`	`01011010`	Z	`Z`	Uppercase Z
91	`5B`	`133`	`01011011`	[	`[`	Left square bracket
92	`5C`	`134`	`01011100`	\	`\`	Backslash
93	`5D`	`135`	`01011101`	]	`]`	Right square bracket
94	`5E`	`136`	`01011110`	^	`^`	Caret
95	`5F`	`137`	`01011111`	_	`_`	Underscore
96	`60`	`140`	`01100000`	`	```	Grave accent (backtick)
97	`61`	`141`	`01100001`	a	`a`	Lowercase a
98	`62`	`142`	`01100010`	b	`b`	Lowercase b
99	`63`	`143`	`01100011`	c	`c`	Lowercase c
100	`64`	`144`	`01100100`	d	`d`	Lowercase d
101	`65`	`145`	`01100101`	e	`e`	Lowercase e
102	`66`	`146`	`01100110`	f	`f`	Lowercase f
103	`67`	`147`	`01100111`	g	`g`	Lowercase g
104	`68`	`150`	`01101000`	h	`h`	Lowercase h
105	`69`	`151`	`01101001`	i	`i`	Lowercase i
106	`6A`	`152`	`01101010`	j	`j`	Lowercase j
107	`6B`	`153`	`01101011`	k	`k`	Lowercase k
108	`6C`	`154`	`01101100`	l	`l`	Lowercase l
109	`6D`	`155`	`01101101`	m	`m`	Lowercase m
110	`6E`	`156`	`01101110`	n	`n`	Lowercase n
111	`6F`	`157`	`01101111`	o	`o`	Lowercase o
112	`70`	`160`	`01110000`	p	`p`	Lowercase p
113	`71`	`161`	`01110001`	q	`q`	Lowercase q
114	`72`	`162`	`01110010`	r	`r`	Lowercase r
115	`73`	`163`	`01110011`	s	`s`	Lowercase s
116	`74`	`164`	`01110100`	t	`t`	Lowercase t
117	`75`	`165`	`01110101`	u	`u`	Lowercase u
118	`76`	`166`	`01110110`	v	`v`	Lowercase v
119	`77`	`167`	`01110111`	w	`w`	Lowercase w
120	`78`	`170`	`01111000`	x	`x`	Lowercase x
121	`79`	`171`	`01111001`	y	`y`	Lowercase y
122	`7A`	`172`	`01111010`	z	`z`	Lowercase z
123	`7B`	`173`	`01111011`	{	`{`	Left curly brace
124	`7C`	`174`	`01111100`	\|	`\|`	Vertical bar (pipe)
125	`7D`	`175`	`01111101`	}	`}`	Right curly brace
126	`7E`	`176`	`01111110`	~	`~`	Tilde
127	`7F`	`177`	`01111111`	DEL	``	Delete
Extended ASCII (Windows-1252)
128	`80`	`200`	`10000000`	€	`€`	Euro sign
129	`81`	`201`	`10000001`			Unused in Windows-1252
130	`82`	`202`	`10000010`	‚	`&sbquo;`	Single low-9 quotation mark
131	`83`	`203`	`10000011`	ƒ	`&fnof;`	Latin small letter f with hook
132	`84`	`204`	`10000100`	„	`&bdquo;`	Double low-9 quotation mark
133	`85`	`205`	`10000101`	…	`…`	Horizontal ellipsis
134	`86`	`206`	`10000110`	†	`&dagger;`	Dagger
135	`87`	`207`	`10000111`	‡	`&Dagger;`	Double dagger
136	`88`	`210`	`10001000`	ˆ	`&circ;`	Modifier letter circumflex accent
137	`89`	`211`	`10001001`	‰	`&permil;`	Per mille sign
138	`8A`	`212`	`10001010`	Š	`&Scaron;`	Latin capital letter s with caron
139	`8B`	`213`	`10001011`	‹	`&lsaquo;`	Single left-pointing angle quotation mark
140	`8C`	`214`	`10001100`	Œ	`&OElig;`	Latin capital ligature oe
141	`8D`	`215`	`10001101`			Unused in Windows-1252
142	`8E`	`216`	`10001110`	Ž	`Ž`	Latin capital letter z with caron
143	`8F`	`217`	`10001111`			Unused in Windows-1252
144	`90`	`220`	`10010000`			Unused in Windows-1252
145	`91`	`221`	`10010001`	‘	`‘`	Left single quotation mark
146	`92`	`222`	`10010010`	’	`’`	Right single quotation mark
147	`93`	`223`	`10010011`	“	`“`	Left double quotation mark
148	`94`	`224`	`10010100`	”	`”`	Right double quotation mark
149	`95`	`225`	`10010101`	•	`•`	Bullet
150	`96`	`226`	`10010110`	–	`–`	En dash
151	`97`	`227`	`10010111`	—	`—`	Em dash
152	`98`	`230`	`10011000`	˜	`&tilde;`	Small tilde
153	`99`	`231`	`10011001`	™	`™`	Trade mark sign
154	`9A`	`232`	`10011010`	š	`&scaron;`	Latin small letter s with caron
155	`9B`	`233`	`10011011`	›	`&rsaquo;`	Single right-pointing angle quotation mark
156	`9C`	`234`	`10011100`	œ	`&oelig;`	Latin small ligature oe
157	`9D`	`235`	`10011101`			Unused in Windows-1252
158	`9E`	`236`	`10011110`	ž	`ž`	Latin small letter z with caron
159	`9F`	`237`	`10011111`	Ÿ	`&Yuml;`	Latin capital letter y with diaeresis
160	`A0`	`240`	`10100000`	NBSP	` `	Non-breaking space
161	`A1`	`241`	`10100001`	¡	`¡`	Inverted exclamation mark
162	`A2`	`242`	`10100010`	¢	`¢`	Cent sign
163	`A3`	`243`	`10100011`	£	`£`	Pound sign
164	`A4`	`244`	`10100100`	¤	`¤`	Currency sign
165	`A5`	`245`	`10100101`	¥	`¥`	Yen sign
166	`A6`	`246`	`10100110`	¦	`¦`	Broken bar
167	`A7`	`247`	`10100111`	§	`§`	Section sign
168	`A8`	`250`	`10101000`	¨	`¨`	Diaeresis
169	`A9`	`251`	`10101001`	©	`©`	Copyright sign
170	`AA`	`252`	`10101010`	ª	`ª`	Feminine ordinal indicator
171	`AB`	`253`	`10101011`	«	`«`	Left-pointing double angle quotation mark
172	`AC`	`254`	`10101100`	¬	`¬`	Not sign
173	`AD`	`255`	`10101101`	SHY	``	Soft hyphen
174	`AE`	`256`	`10101110`	®	`®`	Registered sign
175	`AF`	`257`	`10101111`	¯	`¯`	Macron
176	`B0`	`260`	`10110000`	°	`°`	Degree sign
177	`B1`	`261`	`10110001`	±	`±`	Plus-minus sign
178	`B2`	`262`	`10110010`	²	`²`	Superscript two
179	`B3`	`263`	`10110011`	³	`³`	Superscript three
180	`B4`	`264`	`10110100`	´	`´`	Acute accent
181	`B5`	`265`	`10110101`	µ	`µ`	Micro sign
182	`B6`	`266`	`10110110`	¶	`¶`	Pilcrow sign
183	`B7`	`267`	`10110111`	·	`·`	Middle dot
184	`B8`	`270`	`10111000`	¸	`¸`	Cedilla
185	`B9`	`271`	`10111001`	¹	`¹`	Superscript one
186	`BA`	`272`	`10111010`	º	`º`	Masculine ordinal indicator
187	`BB`	`273`	`10111011`	»	`»`	Right-pointing double angle quotation mark
188	`BC`	`274`	`10111100`	¼	`¼`	Vulgar fraction one quarter
189	`BD`	`275`	`10111101`	½	`½`	Vulgar fraction one half
190	`BE`	`276`	`10111110`	¾	`¾`	Vulgar fraction three quarters
191	`BF`	`277`	`10111111`	¿	`¿`	Inverted question mark
192	`C0`	`300`	`11000000`	À	`À`	Latin capital letter a with grave
193	`C1`	`301`	`11000001`	Á	`Á`	Latin capital letter a with acute
194	`C2`	`302`	`11000010`	Â	`Â`	Latin capital letter a with circumflex
195	`C3`	`303`	`11000011`	Ã	`Ã`	Latin capital letter a with tilde
196	`C4`	`304`	`11000100`	Ä	`Ä`	Latin capital letter a with diaeresis
197	`C5`	`305`	`11000101`	Å	`Å`	Latin capital letter a with ring above
198	`C6`	`306`	`11000110`	Æ	`Æ`	Latin capital letter ae
199	`C7`	`307`	`11000111`	Ç	`Ç`	Latin capital letter c with cedilla
200	`C8`	`310`	`11001000`	È	`È`	Latin capital letter e with grave
201	`C9`	`311`	`11001001`	É	`É`	Latin capital letter e with acute
202	`CA`	`312`	`11001010`	Ê	`Ê`	Latin capital letter e with circumflex
203	`CB`	`313`	`11001011`	Ë	`Ë`	Latin capital letter e with diaeresis
204	`CC`	`314`	`11001100`	Ì	`Ì`	Latin capital letter i with grave
205	`CD`	`315`	`11001101`	Í	`Í`	Latin capital letter i with acute
206	`CE`	`316`	`11001110`	Î	`Î`	Latin capital letter i with circumflex
207	`CF`	`317`	`11001111`	Ï	`Ï`	Latin capital letter i with diaeresis
208	`D0`	`320`	`11010000`	Ð	`Ð`	Latin capital letter eth
209	`D1`	`321`	`11010001`	Ñ	`Ñ`	Latin capital letter n with tilde
210	`D2`	`322`	`11010010`	Ò	`Ò`	Latin capital letter o with grave
211	`D3`	`323`	`11010011`	Ó	`Ó`	Latin capital letter o with acute
212	`D4`	`324`	`11010100`	Ô	`Ô`	Latin capital letter o with circumflex
213	`D5`	`325`	`11010101`	Õ	`Õ`	Latin capital letter o with tilde
214	`D6`	`326`	`11010110`	Ö	`Ö`	Latin capital letter o with diaeresis
215	`D7`	`327`	`11010111`	×	`×`	Multiplication sign
216	`D8`	`330`	`11011000`	Ø	`Ø`	Latin capital letter o with stroke
217	`D9`	`331`	`11011001`	Ù	`Ù`	Latin capital letter u with grave
218	`DA`	`332`	`11011010`	Ú	`Ú`	Latin capital letter u with acute
219	`DB`	`333`	`11011011`	Û	`Û`	Latin capital letter u with circumflex
220	`DC`	`334`	`11011100`	Ü	`Ü`	Latin capital letter u with diaeresis
221	`DD`	`335`	`11011101`	Ý	`Ý`	Latin capital letter y with acute
222	`DE`	`336`	`11011110`	Þ	`Þ`	Latin capital letter thorn
223	`DF`	`337`	`11011111`	ß	`ß`	Latin small letter sharp s
224	`E0`	`340`	`11100000`	à	`à`	Latin small letter a with grave
225	`E1`	`341`	`11100001`	á	`á`	Latin small letter a with acute
226	`E2`	`342`	`11100010`	â	`â`	Latin small letter a with circumflex
227	`E3`	`343`	`11100011`	ã	`ã`	Latin small letter a with tilde
228	`E4`	`344`	`11100100`	ä	`ä`	Latin small letter a with diaeresis
229	`E5`	`345`	`11100101`	å	`å`	Latin small letter a with ring above
230	`E6`	`346`	`11100110`	æ	`æ`	Latin small letter ae
231	`E7`	`347`	`11100111`	ç	`ç`	Latin small letter c with cedilla
232	`E8`	`350`	`11101000`	è	`è`	Latin small letter e with grave
233	`E9`	`351`	`11101001`	é	`é`	Latin small letter e with acute
234	`EA`	`352`	`11101010`	ê	`ê`	Latin small letter e with circumflex
235	`EB`	`353`	`11101011`	ë	`ë`	Latin small letter e with diaeresis
236	`EC`	`354`	`11101100`	ì	`ì`	Latin small letter i with grave
237	`ED`	`355`	`11101101`	í	`í`	Latin small letter i with acute
238	`EE`	`356`	`11101110`	î	`î`	Latin small letter i with circumflex
239	`EF`	`357`	`11101111`	ï	`ï`	Latin small letter i with diaeresis
240	`F0`	`360`	`11110000`	ð	`ð`	Latin small letter eth
241	`F1`	`361`	`11110001`	ñ	`ñ`	Latin small letter n with tilde
242	`F2`	`362`	`11110010`	ò	`ò`	Latin small letter o with grave
243	`F3`	`363`	`11110011`	ó	`ó`	Latin small letter o with acute
244	`F4`	`364`	`11110100`	ô	`ô`	Latin small letter o with circumflex
245	`F5`	`365`	`11110101`	õ	`õ`	Latin small letter o with tilde
246	`F6`	`366`	`11110110`	ö	`ö`	Latin small letter o with diaeresis
247	`F7`	`367`	`11110111`	÷	`÷`	Division sign
248	`F8`	`370`	`11111000`	ø	`ø`	Latin small letter o with stroke
249	`F9`	`371`	`11111001`	ù	`ù`	Latin small letter u with grave
250	`FA`	`372`	`11111010`	ú	`ú`	Latin small letter u with acute
251	`FB`	`373`	`11111011`	û	`û`	Latin small letter u with circumflex
252	`FC`	`374`	`11111100`	ü	`ü`	Latin small letter u with diaeresis
253	`FD`	`375`	`11111101`	ý	`ý`	Latin small letter y with acute
254	`FE`	`376`	`11111110`	þ	`þ`	Latin small letter thorn
255	`FF`	`377`	`11111111`	ÿ	`ÿ`	Latin small letter y with diaeresis

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