HTML Entity for Double Struck Small Gamma (ℽ)

Beginner
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+213D
HTML entity for Double Struck Small Gamma (U+213D) tutorial illustration

What You'll Learn

How to display the Double Struck Small Gamma (ℽ) in HTML using hexadecimal, decimal, and CSS escape methods. This character is U+213D (DOUBLE-STRUCK SMALL GAMMA) in the Letterlike Symbols block (U+2100–U+214F)—the open-face (double-struck) form of Greek small gamma used in mathematics, physics, and set theory.

Render it with ℽ, ℽ, or CSS escape \213D. There is no named HTML entity for U+213D. For regular (non-double-struck) small gamma use γ or γ (γ). For capital double-struck Gamma see U+213E (ℾ). See also math entities.

⚡ Quick Reference — Double Struck Small Gamma

Unicode U+213D

Letterlike Symbols block

Hex Code ℽ

Hexadecimal reference

HTML Code ℽ

Decimal reference

Named Entity —

Not available for U+213D

Reference Table
Name           Value
────────────   ──────────
Unicode        U+213D
Hex code       ℽ
HTML code      ℽ
Named entity   —
CSS code       \213D
Related        U+03B3 = Small gamma (γ); U+213E = Capital (ℾ)
1

Complete HTML Example

This example demonstrates the Double Struck Small Gamma (ℽ) using hexadecimal code, decimal HTML code, and a CSS content escape. There is no named HTML entity:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\213D";
  }
 </style>
</head>
<body>
<p>Double Struck Small Gamma using Hexadecimal: &#x213D;</p>
<p>Double Struck Small Gamma using HTML Code: &#8509;</p>
<p id="point">Double Struck Small Gamma using CSS Entity: </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

U+213D is widely supported in modern browsers when rendered with a font that includes Letterlike Symbols:

Chrome 1+
Firefox 1+
Safari 1+
Edge 12+
Opera 4+
Android 4.4+
iOS Safari 1+

👀 Live Preview

See the Double Struck Small Gamma (ℽ) in mathematical notation:

Large glyph ℽ
vs regular gamma ℽ double-struck   γ regular
vs capital double-struck ℽ small   ℾ capital
Named vs numeric &gamma; → γ   &#x213D; → ℽ
Monospace refs &#x213D; &#8509; \213D

🧠 How It Works

1

Hexadecimal Code

&#x213D; uses the Unicode hexadecimal value 213D to display the Double Struck Small Gamma. The x prefix indicates hexadecimal format.

HTML markup
2

Decimal HTML Code

&#8509; uses the decimal Unicode value 8509 to display the same character.

HTML markup
3

CSS Entity

\213D is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.

CSS stylesheet
=

Same visual result

All three methods produce: ℽ. Unicode U+213D. Regular small gamma is &gamma; (γ, U+03B3). Capital double-struck is U+213E (ℾ). No named entity for U+213D.

✅

Use Cases

The Double Struck Small Gamma (ℽ) commonly appears in:

📐 Set theory & math

Notation for sets, variables, or constants that use the double-struck small gamma in mathematical expressions and proofs.

🔬 Physics & constants

Euler–Mascheroni constant or other gamma-related notation where the double-struck form distinguishes from regular γ.

📚 Academic publishing

Textbooks, papers, and course materials requiring letterlike math symbols in HTML.

💻 Math on the web

Equation editors and math rendering alongside other double-struck Greek letters.

📖 Unicode references

Entity lists and guides for Letterlike Symbols (U+2100–U+214F).

♿ Accessibility

Use math-capable fonts so ℽ renders clearly for all readers.

💡 Best Practices

Do

  • Use &#x213D; or &#8509; for ℽ
  • Use math fonts (Cambria Math, STIX Two Math) for reliable rendering
  • Distinguish ℽ (double-struck) from γ (&gamma;, regular)
  • Distinguish small ℽ from capital double-struck ℾ (U+213E)
  • Use \213D only inside CSS content
  • Keep entity style consistent across the document

Don’t

  • Assume a named entity exists for U+213D—it does not
  • Use &gamma; when you need regular γ, not double-struck ℽ
  • Put CSS escape \213D in HTML text nodes
  • Forget UTF-8 (<meta charset="utf-8">) on math pages
  • Assume every font includes Letterlike Symbols

Key Takeaways

1

No named entity—use numeric references

&#x213D; &#8509;
2

For CSS stylesheets, use the escape in the content property

\213D
3

Unicode U+213D DOUBLE-STRUCK SMALL GAMMA

4

Regular γ: U+03B3 via &gamma; or &#x03B3;

5

Three methods, one glyph — widely supported in modern browsers

❓ Frequently Asked Questions

Use &#x213D; (hex), &#8509; (decimal), or \213D in CSS content. All produce ℽ. There is no named HTML entity for U+213D.
U+213D (DOUBLE-STRUCK SMALL GAMMA). Letterlike Symbols block (U+2100–U+214F). Hex 213D, decimal 8509. Double-struck form of Greek small gamma.
When you need the double-struck small gamma in mathematical or scientific content: set theory, physics (e.g. gamma-related constants), expressions, academic papers, or any context where this letterlike symbol is required.
HTML numeric references (&#8509; or &#x213D;) go in markup. The CSS escape \213D is used in stylesheets, typically in the content property of pseudo-elements.
Only some Letterlike Symbols have named entities (e.g. &ii;, &dd;). U+213D does not. Use &#x213D;, &#8509;, or \213D. For regular small gamma use &gamma; (U+03B3, γ).

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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
  • Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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