Uppercase H script (ℋ) is the Unicode character at U+210B in Letterlike Symbols. Official name: SCRIPT CAPITAL H — a script-style capital H used in mathematical notation, most often for the Hamiltonian operator in quantum mechanics.
Remember
Character ℋ
Unicode U+210B
Named entity ℋ
Hex entity ℋ
Decimal ℋ
CSS escape \210B
Not the same H · ℍ · ʜ
Prefer ℋ in HTML markup. Numeric forms and typing ℋ in UTF-8 also work. Use a math-capable font when the script shape matters.
Using Named Entity: ℋ
Using Hex Code: ℋ
Using HTML Code: ℋ
Using CSS Entity: ℋ
Typed directly: ℋ
Hamiltonian: ℋψ = Eψ
How It Works
1. Named:ℋ is the clearest HTML form for U+210B (from “Hamiltonian”).
2. Hex:U+210B → ℋ in HTML. Same glyph as the named entity.
3. Decimal: same code point as 8459 → ℋ. Same glyph as hex and named.
4. CSS: use \210B in content (not an HTML entity). #point::after appends that ℋ after the paragraph text.
5. Typed / math: paste ℋ in UTF-8, or write ℋψ = Eψ for a short Schrödinger-style label.
Pitfalls & Tips
Common mistakes when working with U+210B.
vs H
Not a plain capital H
ASCII H (U+0048) is not letterlike. Use ℋ when you need the script Hamiltonian symbol.
vs ℍ
Not double-struck H
ℍ (ℍ) is blackboard bold for quaternions. ℋ is script H for the Hamiltonian.
vs italic
Not CSS italic
font-style: italic only styles a letter. U+210B is a dedicated script capital character.
Fonts
Letterlike coverage varies
Some fonts fall back to a plain H. Prefer Cambria Math, STIX, or another math font for ℋ.
CSS vs HTML
Do not mix escapes
\210B belongs in CSS strings. ℋ / ℋ / ℋ belong in HTML.
Math
Mark math context
For formulas, wrap math in appropriate markup (for example MathML or a math role) so assistive tech can treat it as math.
Compatibility
Browser Support
Script capital H (U+210B) and its entity forms (ℋ, ℋ, ℋ, CSS \\210B) are supported in all mainstream browsers. Visible glyphs depend on Letterlike Symbols font coverage.
✓ Universal support
Uppercase H Script (ℋ)
Encode with named, 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 ExplorerIE 9+
Yes
U+210B / ℋFull support
Bottom line: Prefer ℋ in HTML. Use \\210B only inside CSS content. Do not confuse with plain H or ℍ (ℍ).
Remember
Key Takeaways
Unicode: script capital H is U+210B (decimal 8459) — glyph ℋ.
HTML: prefer ℋ — also ℋ / ℋ.
CSS: use \210B inside content for generated text.
Meaning:ℋ is script / Hamiltonian — not plain H, not ℍ.
Use ℋ (named), ℋ (hex), ℋ (decimal), type ℋ directly in UTF-8, or the CSS escape \210B in content. Prefer ℋ in normal HTML.
U+210B (SCRIPT CAPITAL H). Hex 210B, decimal 8459. It belongs to Letterlike Symbols (U+2100–U+214F).
Yes. Use ℋ. Numeric forms ℋ and ℋ also work.
No. ℋ is script capital H (U+210B, ℋ). Plain H is U+0048. ℍ is double-struck H (ℍ, U+210D).
Use it in mathematical or physics notation for the Hamiltonian operator (for example ℋψ = Eψ), or whenever script capital H is required — not as a substitute for plain H.
HTML entities (ℋ, ℋ, or ℋ) go in markup. The CSS escape \210B goes in stylesheet strings (usually content on ::before/::after).
🤔
Did you know?
Script capital H is Unicode U+210B (decimal 8459) — glyph ℋ in Letterlike Symbols (U+2100–U+214F). HTML5 names it ℋ. Official name: SCRIPT CAPITAL H. In physics it often denotes the Hamiltonian operator. Prefer a math-capable font for the script look.
