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Planck Constant HTML entity ℎ
ℎ is the HTML entity for Planck Constant ℎ (U+210E). Copy the decimal ℎ and hex ℎ codes plus CSS, JavaScript, Python and URL escapes.
- Entity
ℎ- Code point
- U+210E
- Unicode name
- PLANCK CONSTANT
- Block
- Letterlike Symbols
- Category
- Lowercase letter (Ll)
- Since
- Unicode 1.1
- Defined in
- HTML5
Codes to copy
| HTML named | ℎWorks in HTML; in XML only & < > " ' are predefined. | |
|---|---|---|
| HTML decimal | ℎWorks in HTML and XML. | |
| HTML hex | ℎWorks in HTML and XML. | |
| CSS | content: "\210E";In a stylesheet, for ::before and ::after. | |
| JavaScript | "\u210E"Also valid in JSON. | |
| Python | "\u210e"Python 3 string literal. | |
| Python by name | "\N{PLANCK CONSTANT}"Readable alternative using the Unicode name. | |
| URL | %E2%84%8EPercent-encoded UTF-8 bytes, for a path or query value. | |
| UTF-8 bytes | E2 84 8E3 bytes. | |
| UTF-16 | 210E1 code unit, which is what JavaScript length counts. |
When to use it
ℎ writes U+210E (Planck Constant), a small letter from the Unicode Letterlike Symbols block, encoded since Unicode 1.1. These characters exist mostly for compatibility with older character sets; for anything beyond simple cases, <sup>, <sub> or MathML give more control.
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 letterlike symbols, numbers and fractions
ℐScript Capital IℌBlack-Letter Capital HℑBlack-Letter Capital IℋScript Capital HℒScript Capital L℅Care ofℓScript Small LℂDouble-Struck Capital C
All letterlike symbols, numbers and fractions · 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).