±
Plus-or-minus sign
ExtendedASCII 177 | Hex 0xB1 | U+00B1
ASCII Code
Decimal
177
Hexadecimal
0xB1
Octal
261
Binary
1011 0001
How to Type
Windows Alt CodeAlt + 177
HTML Entity
±
Unicode InputU+00B1
Character in Different Encodings
| Encoding | Code | Symbol | Name |
|---|---|---|---|
| Code page 437 | 177 | ▒ | Medium shade |
| ISO-8859-1 | 177 | ± | Plus-or-minus sign |
| ISO-8859-2 | 177 | ą | Latin small letter a with ogonek |
| ISO-8859-3 | 177 | ħ | Latin small letter h with stroke |
| ISO-8859-4 | 177 | ą | Latin small letter a with ogonek |
| ISO-8859-5 | 177 | Б | Cyrillic capital letter Be |
| ISO-8859-6 | 177 | - | Unused |
| ISO-8859-7 | 177 | ± | Plus-or-minus sign |
| ISO-8859-8 | 177 | ± | Plus-or-minus sign |
| ISO-8859-9 | 177 | ± | Plus-or-minus sign |
| ISO-8859-10 | 177 | ą | Latin small letter a with ogonek |
| ISO-8859-11 | 177 | ฑ | Thai character Tho Nangmontho |
| Windows-1250 | 177 | ± | Plus-or-minus sign |
| Windows-1251 | 177 | ± | Plus-or-minus sign |
| Windows-1252 | 177 | ± | Plus-or-minus sign |
| Windows-1253 | 177 | ± | Plus-or-minus sign |
| Windows-1254 | 177 | ± | Plus-or-minus sign |
| Windows-1255 | 177 | ± | Plus-or-minus sign |
| Windows-1256 | 177 | ± | Plus-or-minus sign |
| Windows-1257 | 177 | ± | Plus-or-minus sign |
| Windows-1258 | 177 | ± | Plus-or-minus sign |
Frequently Asked Questions
What is ASCII code 177?
ASCII code 177 represents the Plus-or-minus sign character. In hexadecimal it is 0xB1, in binary 1011 0001, and in octal 261. This is an extended ASCII character whose meaning varies by encoding.
How do I type ASCII 177 on a keyboard?
On Windows, hold Alt and type 177 on the numeric keypad. On Mac, you can use the Character Viewer (Edit > Emoji & Symbols). In HTML, use the entity ± or ±.