Planck Constant
U+210ELetterlike Symbols
Copy and paste ℎ. The Planck Constant character has Unicode code point U+210E and decimal HTML code ℎ.
Symbol codes
- Unicode
U+210E- HTML Code
ℎ- CSS Code
\210E- HTML Entity
ℎ- HEX Code
ℎ
Technical properties
Unicode 18.0.0
- Code point
- U+210E
- Decimal
- 8462
- Unicode name
- PLANCK CONSTANT
- Block
- Letterlike Symbols · U+2100–U+214F
- General category
- Lowercase Letter (Ll)
- Script
- Common
- Introduced
- Unicode 1.1
- JavaScript
- "\u210E"
Appears in
About Planck Constant
ℎ is encoded in Unicode as code point U+210E (decimal 8462). Its official Unicode name is PLANCK CONSTANT.
It belongs to the Letterlike Symbols block (U+2100–U+214F), its General Category is Lowercase Letter (Ll), and it was added in Unicode 1.1, released in 1993. Its script value is Common: it is shared across writing systems rather than belonging to one.
Sources: Unicode Character Database 18.0.0, the HTML Standard’s list of named character references, and Unicode’s code page mappings.
How to type or insert Planck Constant
- Any device
- Select Copy symbol, then paste with Ctrl+V, or ⌘+V on a Mac.
- Microsoft Word
- Type
210E, then press Alt+X. - macOS Character Viewer
- Press Control+⌘+Space and search for “planck constant”.
- Linux (GTK and IBus)
- Press Ctrl+Shift+U, type
210e, then press Space. - HTML
ℎorℎ. In a UTF-8 page you can also paste the character itself.- CSS
content: "\210E";in a::beforeor::afterrule.- JavaScript
"\u210E"
Common questions about Planck Constant
What is the Planck Constant symbol?
ℎ (Planck Constant) is a lowercase letter in Unicode’s Letterlike Symbols block. Its code point is U+210E, and it has been part of the standard since Unicode 1.1 (1993).
How do I copy and paste the Planck Constant symbol?
Select Copy symbol at the top of this page, then paste with Ctrl+V on Windows and Linux or ⌘+V on a Mac. On a phone, tap Copy symbol, then touch and hold where you want it and choose Paste. ℎ pastes as ordinary text, so it works in documents, messages, and code.
How do I type the Planck Constant symbol on Windows?
In Microsoft Word, type 210E and press Alt+X to turn the code into ℎ. In any app, open Character Map from the Start menu, search for “planck constant”, then select and copy the character.
How do I type the Planck Constant symbol on a Mac?
Press Control+⌘+Space to open the Character Viewer, search for “planck constant”, and double-click the result to insert it.
How do I type the Planck Constant symbol on an iPhone or Android phone?
The simplest way is to copy it from this page and paste it where you need it. If you use it often, save it as a text shortcut: on iPhone, go to Settings > General > Keyboard > Text Replacement; with Gboard on Android, go to Gboard settings > Dictionary > Personal dictionary.
Can I use the Planck Constant symbol in Word, Google Docs, and social media?
Yes. ℎ is a standard Unicode character, so you can paste it into Microsoft Word, Google Docs, emails, and posts or bios on Instagram, X, Facebook, and TikTok. In Google Docs you can also choose Insert > Special characters and search for “planck constant”. In Word, choose Insert > Symbol > More Symbols, set from to Unicode (hex), and enter 210E as the character code.
Is the Planck Constant symbol an emoji?
No. ℎ is a text symbol, not an emoji. It takes the color and size of the surrounding text, and its exact shape depends on the font.
Why does the Planck Constant symbol show as a box or question mark?
An empty box or a question mark means the font on that device has no glyph for ℎ. The character is still there: it appears correctly wherever a font covers Unicode’s Letterlike Symbols block, and free font families such as Google Noto cover nearly all of Unicode.
What are the HTML and CSS codes for the Planck Constant symbol?
In HTML, write ℎ (decimal) or ℎ (hexadecimal), or the named entity ℎ. In CSS, use content: "\210E"; in a ::before or ::after rule, and in JavaScript "\u210E". See all HTML codes.