Double-struck small pi (ℼ) is the Unicode character at U+213C in the Letterlike Symbols block. Official name: DOUBLE-STRUCK SMALL PI (also called blackboard bold small pi). It is used in mathematical and scientific notation.
Remember
Character ℼ
Unicode U+213C
Hex entity ℼ
Decimal ℼ
CSS escape \213C
Named entity (none)
Not the same π (π) · ℿ · ∏ (∏)
Prefer ℼ or ℼ in HTML (no named form). You can also type ℼ in UTF-8.
Double-struck small pi rendered alone and compared with related forms.
ExampleSet ℼ
Large glyphℼ
Comparedℼ π ℿ ∏
With entitiesHex: ℼ | Decimal: ℼ
Code
Complete HTML Example
One page that shows Double Struck Small Pi with hex, decimal, CSS escape, and a typed character. Use View Output or open the live editor.
Hex + Decimal + CSS + Typed
Four ways to produce ℼ, plus a comparison with Greek π.
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Double Struck Small Pi (ℼ) in HTML</title>
<style>
#point::after {
content: "\213C";
}
</style>
</head>
<body>
<p>Double-struck pi using Hex Code: ℼ</p>
<p>Double-struck pi using HTML Code: ℼ</p>
<p id="point">Double-struck pi using CSS Entity: </p>
<p>Typed directly: ℼ</p>
<p>Compared: ℼ (double-struck) vs π (Greek)</p>
</body>
</html>
Double-struck pi using Hex Code: ℼ
Double-struck pi using HTML Code: ℼ
Double-struck pi using CSS Entity: ℼ
Typed directly: ℼ
Compared: ℼ (double-struck) vs π (Greek)
How It Works
1. Hex:U+213C → ℼ in HTML. Preferred when there is no named entity.
2. Decimal: same code point as 8508 → ℼ. Same result as hex.
3. CSS: use \213C in content (not an HTML entity). #point::after appends that ℼ after the paragraph text.
4. Typed / compared: paste ℼ in UTF-8, or contrast it with π (π).
Pitfalls & Tips
Common mistakes when working with Double Struck Small Pi.
Name
No named entity
There is no HTML5 named entity for U+213C. Use ℼ or ℼ.
π
Not π
π is Greek small pi (U+03C0). Double-struck small pi is a different Letterlike Symbol.
ℿ
Small vs capital
U+213F is double-struck capital pi (ℿ). U+213C is the small form.
∏
Not ∏
∏ is the n-ary product operator (U+220F). Use it for product notation, not for blackboard-bold pi.
CSS vs HTML
Do not mix escapes
\213C belongs in CSS strings. ℼ / ℼ belong in HTML.
Fonts
Math font coverage
Some fonts omit Letterlike Symbols. Prefer a math-capable font for reliable display of ℼ.
Semicolon
End references
Always finish numeric entities with ; — write ℼ, not ℼ.
Compatibility
Browser Support
Double-struck small pi (U+213C) and its entity forms (ℼ, ℼ, CSS \\213C) are supported in all mainstream browsers. Visible glyphs depend on math / Letterlike Symbols font coverage.
✓ Universal support
Double Struck Small Pi (ℼ)
Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+213C / entitiesFull support
Bottom line: Prefer ℼ in HTML (no named form). Use ℼ when decimal form is required, and \\213C only inside CSS content.
Remember
Key Takeaways
Unicode: double-struck small pi is U+213C (decimal 8508) — glyph ℼ.
HTML: no named entity — use ℼ / ℼ / type ℼ.
CSS: use \213C inside content for generated text.
Meaning:ℼ = blackboard-bold small pi — not π, not ∏, not ℿ.
One line:U+213C → ℼ / ℼ / CSS \213C / type ℼ.
Frequently Asked Questions
Use ℼ (hex), ℼ (decimal), type ℼ directly in UTF-8, or the CSS escape \213C in content. There is no named HTML entity for U+213C.
U+213C (DOUBLE-STRUCK SMALL PI). Hex 213C, decimal 8508. It belongs to the Letterlike Symbols block (U+2100–U+214F).
No. Use numeric forms ℼ or ℼ, or type the character in a UTF-8 document. Greek small pi uses π (U+03C0) — a different character.
Use it in mathematical or scientific text when you need the blackboard-bold / double-struck small pi glyph. Prefer π for ordinary Greek small pi π, and U+213F for the capital double-struck form.
HTML entities (ℼ or ℼ) go in markup. The CSS escape \213C goes in stylesheet strings (usually content on ::before/::after).
No. U+213C is double-struck small pi ℼ. π is Greek small pi π (U+03C0). ∏ is n-ary product ∏ (U+220F). U+213F is double-struck capital pi ℿ.
🤔
Did you know?
Double-struck small pi is Unicode U+213C (decimal 8508) — glyph ℼ in the Letterlike Symbols block. There is no HTML5 named entity; use ℼ or ℼ. Also called blackboard bold small pi. Do not confuse with Greek small pi π (π, U+03C0), double-struck capital pi ℿ (U+213F), or the product operator ∏ (∏).
