Uppercase F Script Capital (ℱ) is the Letterlike Symbols character at Unicode U+2131 (SCRIPT CAPITAL F). HTML5 names it ℱ (also ℱ). Use it for mathematical script notation and formal typography.
Remember
Character ℱ
Unicode U+2131
Named entity ℱ (ℱ)
Hex entity ℱ
Decimal ℱ
CSS escape \2131
Not the same F · Ƒ · ƒ
Named, hex, decimal, CSS, and a typed character all produce the same glyph: ℱ. Prefer ℱ or ℱ in HTML markup. For plain capital F see uppercase F; for F with hook see uppercase F hook.
Built with Named: ℱ
Built with Hex: ℱ
Built with Decimal: ℱ
Built with CSS: ℱ
Typed: ℱ
Math: ℱ(x)
How It Works
1. Named:ℱ is the HTML5 name for U+2131 → ℱ (case-sensitive). ℱ is an alternate name for the same glyph.
2. Hex:ℱ inserts the same code point. Same visual as named.
3. Decimal: same code point as 8497 → ℱ.
4. CSS: use \2131 in content (not an HTML entity). #point::after appends ℱ.
5. Typed: paste ℱ in a UTF-8 document, or write math text with ℱ.
Pitfalls & Tips
Common mistakes when working with Uppercase F Script Capital.
Named
Prefer ℱ
The name is case-sensitive. ℱ and ℱ both render ℱ. Prefer ℱ for shorter, clearer source.
Look-alikes
ℱ ≠ F ≠ Ƒ
Script capital F is ℱ. Plain Latin is F. F with hook is U+0191. Match the notation you need.
A11y
Use the real symbol
Prefer U+2131 (or ℱ) over styling a plain F with a script font when the semantics require the letterlike symbol.
Fonts
Glyph coverage
Letterlike Symbols coverage varies. Prefer fonts with math / symbol support (e.g. Cambria Math) and test on mobile.
CSS vs HTML
Do not mix escapes
\2131 belongs in CSS. ℱ / ℱ / ℱ belong in HTML.
Semicolon
End references
Always finish with ; — write ℱ, not &Fscr.
Compatibility
Browser Support
Uppercase F Script Capital (U+2131) and its entity forms (ℱ, ℱ, ℱ, CSS \\2131) are supported in all modern browsers. Glyph coverage depends on the font.
✓ Universal encoding
Uppercase F Script Capital (ℱ)
Encode with named, hex, decimal, or CSS escape — or type ℱ directly in UTF-8 HTML. Prefer ℱ or ℱ.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes*
U+2131Full support
Bottom line: Prefer ℱ or ℱ for readable HTML. Use \\2131 only inside CSS content. Do not confuse with plain F or F hook Ƒ.
Remember
Key Takeaways
Unicode: this symbol is U+2131 (decimal 8497) — script capital F.
HTML: prefer ℱ — or use ℱ / ℱ (also ℱ).
CSS: use \2131 inside content for generated math text.
Use ℱ (named), ℱ (hex), ℱ (decimal), or the CSS escape \2131 in the content property. All render ℱ. Prefer ℱ or ℱ for readable markup. ℱ is an alternate name for the same character.
U+2131 (SCRIPT CAPITAL F). Hex 2131, decimal 8497, named entities ℱ and ℱ. It belongs to Letterlike Symbols (U+2100–U+214F).
Yes. HTML5 defines ℱ and ℱ for U+2131. Prefer ℱ for general use. Both are case-sensitive.
U+2131 is a letterlike script capital F used in math typography. U+0046 is plain Latin capital F. U+0191 is Latin capital F with hook — a different alphabetic letter.
Use it for mathematical script notation, Fourier-related symbols, and formal typography that needs ℱ — not as a substitute for plain F.
HTML entities (ℱ, ℱ, or ℱ) go in markup. The CSS escape \2131 is used in stylesheets (usually in the content property of ::before/::after). Both render ℱ.
🤔
Did you know?
Uppercase F Script Capital is Unicode U+2131 (decimal 8497) — glyph ℱ (SCRIPT CAPITAL F) in Letterlike Symbols. HTML5 names it ℱ (also ℱ). Prefer it for mathematical script notation. Do not confuse it with plain F (U+0046) or F hook (U+0191).
