Black-letter H (ℌ) is the Letterlike Symbols character at Unicode U+210C (BLACK-LETTER CAPITAL H). It is a fraktur / math symbol, not the everyday Latin letter H or h. HTML5 also defines the named entity ℌ.
Remember
Character ℌ
Unicode U+210C
Named entity ℌ
Hex entity ℌ
Decimal ℌ
CSS escape \210C
All of these produce the same glyph: ℌ. Prefer ℌ or a pasted ℌ in UTF-8 pages; use numeric or CSS forms when you need them.
Reference
Quick Reference
One table for every form you will actually use.
Form
Code
Where it goes
Direct character
ℌ
HTML text (UTF-8 default)
Named entity
ℌ
HTML markup (readable choice)
Hex entity
ℌ
HTML markup
Decimal entity
ℌ
HTML markup
CSS escape
\210C
Stylesheet content
When to Use Which
Situation
Use
Math / scientific UTF-8 text
Type or paste ℌ
Readable entity in HTML source
ℌ
Numeric entity required
ℌ or ℌ
Generated text via ::before / ::after
content: "\210C"
Everyday letter h or H in body copy
Type plain h / H instead
See it
Live Preview
Black-letter H rendered in common contexts.
Inline textHilbert space often written as ℌ
Large glyphℌ
Math-stylex ∈ ℌ
With entitiesNamed: ℌ | Hex: ℌ | Decimal: ℌ
Not the sameh (U+0068) · H (U+0048)
Code
Complete HTML Example
One page that shows black-letter H with named, hex, decimal, and CSS forms. Use View Output or open the live editor.
Named + Hex + Decimal + CSS
Four ways to produce ℌ in a single document.
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Black-Letter H (ℌ) in HTML</title>
<style>
#point::after {
content: "\210C";
}
</style>
</head>
<body>
<p>Black-Letter H using Named Entity: ℌ</p>
<p>Black-Letter H using Hex Code: ℌ</p>
<p>Black-Letter H using HTML Code: ℌ</p>
<p id="point">Black-Letter H using CSS Entity: </p>
</body>
</html>
Black-Letter H using Named Entity: ℌ
Black-Letter H using Hex Code: ℌ
Black-Letter H using HTML Code: ℌ
Black-Letter H using CSS Entity: ℌ
How It Works
1. Named:ℌ is the HTML5 named entity for U+210C. Clearest form in HTML source.
2. Hex:U+210C → ℌ in HTML. Same glyph as named.
3. Decimal: same code point as 8460 → ℌ. Same result.
4. CSS: use \210C in content (not an HTML entity). #point::after appends that ℌ after the paragraph text.
Pitfalls & Tips
Common mistakes when working with the black-letter H entity.
Named
Prefer ℌ
HTML5 defines a named entity for this symbol — use it for readable HTML. Note the capital H in ℌ.
CSS vs HTML
Do not mix escapes
\210C belongs in CSS. ℌ / ℌ / ℌ belong in HTML.
Look-alikes
Not plain h or H
Plain h / H are Basic Latin. Black-letter H is a Letterlike Symbol for math/typography.
Fonts
Check glyph coverage
Some fonts omit Letterlike Symbols. Prefer fonts that include U+210C.
Semicolon
End references
Always finish with ; — write ℌ, not &Hfr.
Purpose
Not for body copy
Use plain H in normal sentences. Reserve ℌ for symbol / math contexts.
Compatibility
Browser Support
Black-letter H (U+210C) and its entity forms (ℌ, ℌ, ℌ, CSS \\210C) are supported in all mainstream browsers. Glyph availability depends on the font.
✓ Universal support
H Black Letter (ℌ)
Use ℌ, paste ℌ, or encode with hex, decimal, or CSS escape — same code point everywhere.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+210C / entitiesFull support
Bottom line: Prefer ℌ or a pasted ℌ in UTF-8 text. Use ℌ / ℌ when a numeric form is required, and \\210C only inside CSS content.
Remember
Key Takeaways
Unicode: black-letter H is U+210C (decimal 8460), Letterlike Symbols.
HTML: prefer ℌ, or use ℌ / ℌ.
CSS: use \210C inside content for generated text.
Note: not the same as plain Latin h or H.
One line:U+210C → ℌ, or ℌ / ℌ / CSS \210C.
Frequently Asked Questions
Use ℌ (named), ℌ (hex), ℌ (decimal), or the CSS escape \210C in the content property. All render ℌ. In UTF-8 files you can also paste ℌ directly.
U+210C (BLACK-LETTER CAPITAL H). Hex 210C, decimal 8460. It belongs to the Letterlike Symbols block and is used in mathematical notation and fraktur typography.
Yes. HTML5 defines ℌ for this character. You can also use numeric references ℌ or ℌ.
Use it in math or scientific content that needs the fraktur H glyph (e.g. Hilbert space), in CSS-generated content, or when encoding must be explicit. Prefer ℌ when you want a readable named form in HTML source.
HTML entities (ℌ, ℌ, or ℌ) go in markup. The CSS escape \210C is used in stylesheets (usually in the content property of ::before/::after). Both render ℌ.
Plain h is U+0068 and H is U+0048 (Basic Latin letters). Black-letter H ℌ is U+210C — a letterlike symbol for math/typography. Do not substitute one for the other.
🤔
Did you know?
Black-letter H (ℌ) is Unicode U+210C (decimal 8460) in the Letterlike Symbols block. HTML5 defines the named entity ℌ — also usable as ℌ or ℌ. It is used in math (e.g. Hilbert space) and fraktur typography — not the same as plain h or H.
