U+210E "ℎ" Planck Constant Unicode Character
Unicode Version 17.0
ℎ
U+210E "ℎ" Planck Constant is a typographic symbol specifically encoded to represent the fundamental physical constant that relates the energy of a photon to its frequency, a cornerstone of quantum mechanics. Unlike a standard italic "h," this dedicated glyph is intended to clearly denote the constant itself in mathematical and scientific notation, preventing ambiguity. Its inclusion in the Unicode standard ensures that this symbol can be reliably and consistently displayed across different digital platforms and fonts, facilitating precise communication in academic literature, equations, and software where the Planck constant must be expressed.
General Properties
| Code Point | U+210E |
| Version Added | 1.1 |
| Name | Planck Constant |
| Block | Letterlike Symbols |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Font |
| Decomposition Mapping | "h" U+0068 Latin Small Letter H |
Encodings
| HTML Decimal Encoding | ℎ |
| HTML Hex Encoding | ℎ |
| UTF-8 Encoding | 0xE2 0x84 0x8E |
| UTF-16 Encoding | 0x210E |
| UTF-32 Encoding | 0x0000210E |
| C/C++/Java Escape | \u210e |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Cased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "h" U+0068 Latin Small Letter H |
| NFKC Simple Casefold | "h" U+0068 Latin Small Letter H |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Math | Yes |
| Other Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |