HTML Entity for Uppercase H Script (ℋ)

Beginner
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+210B
HTML Entity for Uppercase H Script tutorial illustration

What You'll Learn

How to display the script capital H (ℋ) in HTML using named entity, hexadecimal, decimal, and CSS escape methods. This character is part of the Letterlike Symbols block and is widely used in quantum mechanics to denote the Hamiltonian operator. Its official Unicode name is SCRIPT CAPITAL H (U+210B).

Render it with ℋ, ℋ, ℋ, or CSS escape \210B. The named entity ℋ is often the most readable option in HTML source. See also math entities.

⚡ Quick Reference — Uppercase H Script Entity

Unicode U+210B

Letterlike Symbols

Hex Code ℋ

Hexadecimal reference

HTML Code ℋ

Decimal reference

Named Entity ℋ

Hamiltonian operator

Reference Table
Name           Value
────────────   ──────────
Unicode        U+210B
Hex code       ℋ
HTML code      ℋ
Named entity   ℋ
CSS code       \210B
Meaning        Script capital H (Hamiltonian)
Related        U+0048 = plain H; U+210D = ℍ (double-struck H)
Block          Letterlike Symbols (U+2100–U+214F)
1

Complete HTML Example

A simple example showing the script capital H (ℋ) using hexadecimal code, decimal HTML code, the named entity, and a CSS content escape:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\210B";
  }
 </style>
</head>
<body>
<p>Symbol (hex): &#x210B;</p>
<p>Symbol (decimal): &#8459;</p>
<p>Symbol (named): &hamilt;</p>
<p id="point">Symbol (CSS): </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

The script capital H (ℋ) and the named entity &hamilt; are supported in modern browsers when UTF-8 is used:

Chrome1+
Firefox1+
Safari1+
Edge12+
Opera4+
Android4.4+
iOS Safari1+

👀 Live Preview

See the script capital H (ℋ) in mathematical and typographic contexts:

Large glyphℋ
Hamiltonianℋψ = Eψ (Schrödinger equation)
Named entity&hamilt; renders as ℋ
Not the same asplain H (U+0048)  |  ℍ (double-struck H)
Numeric refs&#x210B; &#8459; &hamilt; \210B

🧠 How It Works

1

Hexadecimal Code

&#x210B; uses the Unicode hexadecimal value 210B to display the script capital H. The x prefix indicates hexadecimal format.

HTML markup
2

Decimal HTML Code

&#8459; uses the decimal Unicode value 8459 to display the same character. A common method for Letterlike Symbols.

HTML markup
3

Named Entity

&hamilt; is the standard named entity for ℋ—readable in source HTML and refers to the Hamiltonian operator in physics notation.

HTML markup
4

CSS Entity

\210B is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.

CSS stylesheet
=

Same visual result

All four methods produce the glyph: ℋ. Unicode U+210B sits in Letterlike Symbols. Do not confuse with plain H (U+0048) or ℍ (double-struck H, U+210D).

✅

Use Cases

The script capital H (ℋ) is commonly used in:

⚡ Quantum mechanics

Hamiltonian operator ℋ in the Schrödinger equation and quantum physics documentation.

📐 Mathematical notation

Script-style capital H in equations, formulas, and formal mathematical writing.

🔬 Physics textbooks

Scientific documentation and educational materials on quantum systems and energy operators.

📄 Academic papers

Research papers and scholarly publications in physics and mathematical physics.

🎨 Typography

Elegant script lettering in calligraphy, invitations, and formal design projects.

📚 Education

Physics courses and online tutorials teaching Hamiltonian mechanics and script notation.

💻 Web publishing

Scientific blogs and online textbooks that need proper script H rendering.

💡 Best Practices

Do

  • Use &hamilt; in HTML when possible for readability in physics content
  • Serve pages as UTF-8; you can also type ℋ directly in UTF-8 source
  • Use math-friendly fonts (e.g. Cambria Math, STIX) for reliable script glyph display
  • Distinguish ℋ (script H) from plain H (U+0048) and ℍ (double-struck H)
  • Pick one entity style (named, hex, or decimal) per project for consistency

Don’t

  • Substitute plain H when ℋ is required for the Hamiltonian operator
  • Confuse ℋ (script H) with ℍ (double-struck H for quaternions)
  • Put CSS escape \210B in HTML text nodes
  • Use padded Unicode notation like U+0210B—the correct value is U+210B
  • Use \0210B in CSS—the correct escape is \210B

Key Takeaways

1

Four references render ℋ; named entity is most readable

&#x210B; &#8459; &hamilt;
2

For CSS stylesheets, use the escape in the content property

\210B
3

Unicode U+210B — SCRIPT CAPITAL H

4

Essential for Hamiltonian operator notation in quantum mechanics

5

Previous: Uppercase H Latin (ʜ)   Next: Uppercase H Stroke

❓ Frequently Asked Questions

Use &hamilt; (named), &#x210B; (hex), &#8459; (decimal), or \210B in CSS content. The named entity &hamilt; is the most readable for HTML content.
U+210B (SCRIPT CAPITAL H). Letterlike Symbols block. Hex 210B, decimal 8459. Commonly used to represent the Hamiltonian operator in quantum mechanics.
In mathematical notation, quantum mechanics equations, Hamiltonian operators, typography projects, academic texts, and any content requiring script-style capital H.
HTML code (&#8459; or &#x210B;) or the named entity &hamilt; is used in HTML content. The CSS entity (\210B) is used in CSS, e.g. in the content property of pseudo-elements. Both produce ℋ but in different contexts.
The Hamiltonian operator (ℋ) represents the total energy of a quantum system. It appears in the Schrödinger equation to describe how quantum states evolve over time and is named after William Rowan Hamilton. Script H distinguishes it from other uses of H in physics, such as magnetic field strength.

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About the author

Mari Selvan M P
Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

  • Experience 12 years building web and cloud systems
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I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

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