Double-struck capital pi (ℿ) is the Unicode character at U+213F in the Letterlike Symbols block. Official name: DOUBLE-STRUCK CAPITAL PI (also called blackboard bold capital pi). It is used in mathematical and scientific notation.
Remember
Character ℿ
Unicode U+213F
Hex entity ℿ
Decimal ℿ
CSS escape \213F
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 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+213F → ℿ in HTML. Preferred when there is no named entity.
2. Decimal: same code point as 8511 → ℿ. Same result as hex.
3. CSS: use \213F 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 Capital Pi.
Name
No named entity
There is no HTML5 named entity for U+213F. Use ℿ or ℿ.
Π
Not Π
Π is Greek capital pi (U+03A0). Double-struck capital pi is a different Letterlike Symbol.
∏
Not ∏
∏ is the n-ary product operator (U+220F). Use it for Σ-style product notation, not for blackboard-bold pi.
ℼ
Capital vs small
U+213C is double-struck small pi (ℼ). U+213F is the capital form.
CSS vs HTML
Do not mix escapes
\213F 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 capital pi (U+213F) and its entity forms (ℿ, ℿ, CSS \\213F) are supported in all mainstream browsers. Visible glyphs depend on math / Letterlike Symbols font coverage.
✓ Universal support
Double Struck Capital 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+213F / entitiesFull support
Bottom line: Prefer ℿ in HTML (no named form). Use ℿ when decimal form is required, and \\213F only inside CSS content.
Remember
Key Takeaways
Unicode: double-struck capital pi is U+213F (decimal 8511) — glyph ℿ.
HTML: no named entity — use ℿ / ℿ / type ℿ.
CSS: use \213F inside content for generated text.
Meaning:ℿ = blackboard-bold capital pi — not Π, not ∏, not ℼ.
One line:U+213F → ℿ / ℿ / CSS \213F / type ℿ.
Frequently Asked Questions
Use ℿ (hex), ℿ (decimal), type ℿ directly in UTF-8, or the CSS escape \213F in content. There is no named HTML entity for U+213F.
U+213F (DOUBLE-STRUCK CAPITAL PI). Hex 213F, decimal 8511. 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 capital pi uses Π (U+03A0) — a different character.
Use it in mathematical or scientific text when you need the blackboard-bold / double-struck capital pi glyph. Prefer Π for ordinary Greek capital pi Π, and ∏ for the n-ary product operator ∏.
HTML entities (ℿ or ℿ) go in markup. The CSS escape \213F goes in stylesheet strings (usually content on ::before/::after).
No. U+213F is double-struck capital pi ℿ. Π is Greek capital pi Π (U+03A0). ∏ is n-ary product ∏ (U+220F). U+213C is double-struck small pi ℼ.
🤔
Did you know?
Double-struck capital pi is Unicode U+213F (decimal 8511) — glyph ℿ in the Letterlike Symbols block. There is no HTML5 named entity; use ℿ or ℿ. Also called blackboard bold capital pi. Do not confuse with Greek capital pi Π (Π, U+03A0) or the product operator ∏ (∏).
