HTML Entity for Double Struck Capital Pi (ℿ)
What You'll Learn
How to display the Double Struck Capital Pi (ℿ) in HTML using hexadecimal, decimal, and CSS entity methods. This character is U+213F (DOUBLE-STRUCK CAPITAL PI) in the Letterlike Symbols block (U+2100–U+214F)—the open-face (double-struck) form of Greek capital Pi used in mathematics, set theory, and product notation.
Render it with ℿ, ℿ, or CSS escape \213F. There is no named HTML entity for U+213F. For the regular (non-double-struck) capital Pi use Π or Π (Π). See also math entities.
⚡ Quick Reference — Double Struck Capital Pi
U+213FLetterlike Symbols block
ℿHexadecimal reference
ℿDecimal reference
—Not available for U+213F
Name Value
──────────── ──────────
Unicode U+213F
Hex code ℿ
HTML code ℿ
Named entity —
CSS code \213F
Related U+03A0 = Capital Pi (Π)Complete HTML Example
This example demonstrates the Double Struck Capital Pi (ℿ) using hexadecimal code, decimal HTML code, and a CSS content escape. There is no named HTML entity:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\213F";
}
</style>
</head>
<body>
<p>Double Struck Capital Pi using Hexadecimal: ℿ</p>
<p>Double Struck Capital Pi using HTML Code: ℿ</p>
<p id="point">Double Struck Capital Pi using CSS Entity: </p>
</body>
</html>🌐 Browser Support
U+213F is widely supported in modern browsers when rendered with a font that includes Letterlike Symbols:
👀 Live Preview
See the Double Struck Capital Pi (ℿ) in mathematical notation:
🧠 How It Works
Hexadecimal Code
ℿ uses the Unicode hexadecimal value 213F to display the Double Struck Capital Pi. The x prefix indicates hexadecimal format.
Decimal HTML Code
ℿ uses the decimal Unicode value 8511 to display the same character.
CSS Entity
\213F is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All three methods produce: ℿ. Unicode U+213F. Regular capital Pi is Π (Π, U+03A0). No named entity for U+213F.
Use Cases
The Double Struck Capital Pi (ℿ) commonly appears in:
Product notation, sets, and variables using the double-struck Pi in proofs and expressions.
Scientific notation and equations where the double-struck Pi denotes a product operator or quantity.
Textbooks, papers, and course materials requiring letterlike math symbols in HTML.
Equation editors and math rendering alongside other double-struck Greek letters.
Entity lists and guides for Letterlike Symbols (U+2100–U+214F).
Use math-capable fonts so ℿ renders clearly for all readers.
💡 Best Practices
Do
- Use
ℿorℿfor ℿ - Use math fonts (Cambria Math, STIX Two Math) for reliable rendering
- Distinguish ℿ (double-struck) from Π (
Π, regular) - Use
\213Fonly inside CSScontent - Keep hex or decimal style consistent across the document
Don’t
- Assume a named entity exists for U+213F—it does not
- Use
Πwhen you need regular Π, not double-struck ℿ - Put CSS escape
\213Fin HTML text nodes - Forget UTF-8 (
<meta charset="utf-8">) on math pages - Assume every font includes Letterlike Symbols
Key Takeaways
No named entity—use numeric references
ℿ ℿFor CSS stylesheets, use the escape in the content property
\213FUnicode U+213F DOUBLE-STRUCK CAPITAL PI
Regular Pi: Π via Π or Π
Three methods, one glyph — widely supported in modern browsers
❓ Frequently Asked Questions
ℿ (hex), ℿ (decimal), or \213F in CSS content. All produce ℿ. There is no named HTML entity for U+213F.U+213F (DOUBLE-STRUCK CAPITAL PI). Letterlike Symbols block (U+2100–U+214F). Hex 213F, decimal 8511. Open-face form of Greek capital Pi.ℿ or ℿ) go in markup. The CSS escape \213F is used in stylesheets, typically in the content property of pseudo-elements.Π (U+03A0, Π)—not the same as ℿ.Explore More HTML Entities!
Discover 1500+ HTML character references — math symbols, letterlike glyphs, and more.
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