# ℍ U+210D DOUBLE-STRUCK CAPITAL H

Blackboard bold capital H, math symbol for the quaternions.

| | |
|---|---|
| Character | `ℍ` |
| Codepoint | U+210D |
| Name | DOUBLE-STRUCK CAPITAL H |
| Block | [Letterlike Symbols](https://unicodekit.com/block/letterlike-symbols) |
| Script | Common |
| Category | Uppercase Letter (Lu) |
| Unicode version | 1.1 |
| HTML | `ℍ` `ℍ` |
| CSS | `\210D` |
| JavaScript | `\u210D` |
| UTF-8 | E2 84 8D |
| UTF-16 | 210D |
| Decomposition | font U+0048 |

## Related characters

- ℌ [U+210C BLACK-LETTER CAPITAL H](https://unicodekit.com/char/210C)
- ℎ [U+210E PLANCK CONSTANT](https://unicodekit.com/char/210E)
- ℋ [U+210B SCRIPT CAPITAL H](https://unicodekit.com/char/210B)
- ℏ [U+210F PLANCK CONSTANT OVER TWO PI](https://unicodekit.com/char/210F)
- ℊ [U+210A SCRIPT SMALL G](https://unicodekit.com/char/210A)
- ℐ [U+2110 SCRIPT CAPITAL I](https://unicodekit.com/char/2110)
- ℉ [U+2109 DEGREE FAHRENHEIT](https://unicodekit.com/char/2109)
- ℑ [U+2111 BLACK-LETTER CAPITAL I](https://unicodekit.com/char/2111)
- ℈ [U+2108 SCRUPLE](https://unicodekit.com/char/2108)
- ℒ [U+2112 SCRIPT CAPITAL L](https://unicodekit.com/char/2112)
- ℇ [U+2107 EULER CONSTANT](https://unicodekit.com/char/2107)
- ℓ [U+2113 SCRIPT SMALL L](https://unicodekit.com/char/2113)

Page: https://unicodekit.com/char/210D · JSON: https://unicodekit.com/characters/210D