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Surface Integral HTML entity ∯
∯ is the HTML entity for Surface Integral ∯ (U+222F). Copy the decimal ∯ and hex ∯ codes plus CSS, JavaScript, Python and URL escapes.
- Entity
∯- Also written
∯- Code point
- U+222F
- Unicode name
- SURFACE INTEGRAL
- Block
- Mathematical Operators
- Category
- Math symbol (Sm)
- Since
- Unicode 1.1
- Defined in
- 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: "\222F";In a stylesheet, for ::before and ::after. | |
| JavaScript | "\u222F"Also valid in JSON. | |
| Python | "\u222f"Python 3 string literal. | |
| Python by name | "\N{SURFACE INTEGRAL}"Readable alternative using the Unicode name. | |
| URL | %E2%88%AFPercent-encoded UTF-8 bytes, for a path or query value. | |
| UTF-8 bytes | E2 88 AF3 bytes. | |
| UTF-16 | 222F1 code unit, which is what JavaScript length counts. |
When to use it
∯ writes U+222F (Surface Integral), a maths symbol from the Unicode Mathematical Operators block, encoded since Unicode 1.1. For more than a symbol or two, MathML, supported in all major browsers since 2023, gives proper maths spacing and layout.
The name comes from the HTML5 list (much of it shared with MathML), so it works in every current browser but not in XML or XHTML served as XML, where the numeric reference is the safe choice.
More maths operators
∱Clockwise Integral∭Triple Integral∲Clockwise Contour Integral∬Double Integral∳Anticlockwise Contour Integral∫Integral∴Therefore∪Union
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).