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Plus-Minus Sign HTML entity ±
± is the HTML entity for Plus-Minus Sign ± (U+00B1). Copy the decimal ± and hex ± codes plus CSS, JavaScript, Python and URL escapes.
- Entity
±- Also written
±±- Legacy form
±(no semicolon)- Code point
- U+00B1
- Unicode name
- PLUS-MINUS SIGN
- Block
- Latin-1 Supplement
- Category
- Math symbol (Sm)
- Since
- Unicode 1.1
- Defined in
- HTML 4.01 and HTML5
Codes to copy
| HTML named | ±Works in HTML; in XML only & < > " ' are predefined. | |
|---|---|---|
| HTML decimal | ±Works in HTML and XML. | |
| HTML hex | ±Works in HTML and XML. | |
| CSS | content: "\B1";In a stylesheet, for ::before and ::after. | |
| JavaScript | "\u00B1"Also valid in JSON. | |
| Python | "\u00b1"Python 3 string literal. | |
| Python by name | "\N{PLUS-MINUS SIGN}"Readable alternative using the Unicode name. | |
| URL | %C2%B1Percent-encoded UTF-8 bytes, for a path or query value. | |
| UTF-8 bytes | C2 B12 bytes. | |
| UTF-16 | 00B11 code unit, which is what JavaScript length counts. |
When to use it
For tolerances and uncertainty, such as 5 ± 0.1 mm, and for the two roots of a quadratic. ± and ± are aliases.
The name dates from HTML 4, so it works in every browser and in old email clients.
Browsers also accept the legacy form ± without a semicolon, for compatibility with old pages; new HTML should always end the reference with a semicolon.
More maths operators
×Multiplication Sign¬Not Sign÷Division Sign⁄Fraction Slash℘Script Capital P∀For All∁Complement∂Partial Differential
All maths operators · Every HTML entity · Encode or decode text
Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).