ℏ
Unicode
U+210FLaTeX
\hbarHTML entity
HTML decimal
ℏMathML
<mi>ℏ</mi>Semantic identity and intent
Characters to distinguish
- ∆ — Laplacian Symbol
- Å — Angstrom
- Ω — Ohm
Use ℏ in the right format
Meaning and usage
Represents the reduced Planck constant h divided by 2π.
Use it in quantum-mechanical equations with compatible units.
Pronunciation: reduced planck constant
Formula examples
E=\hbar\omegaHow to type Reduced Planck Constant
- Windows
- Open Character Map and search by name or Unicode U+210F.
- macOS
- Open Character Viewer with Control–Command–Space and search by the symbol name.
- Microsoft Word
- In an equation, type \hbar and press Space when Word supports the command.
- iPhone and iPad
- Copy and paste ℏ, or use a math/LaTeX app. The standard iOS keyboard may not expose every mathematical symbol.
- Android
- Copy and paste ℏ, or use a math keyboard or LaTeX editor. Keyboard layouts vary by device and app.
- Google Docs
- For plain text, paste ℏ or use Insert → Special characters. For structured math, use the equation editor and verify \hbar.
- Excel
- Paste ℏ into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.
Common mistakes
- State the physical quantity, units, and sign convention associated with ℏ; the same symbol can mean different things across disciplines.
- For plain text, copy ℏ as U+210F; for structured equations, use \hbar in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Reduced Planck Constant.
When to use ℏ
- Use ℏ in plain text when a Unicode character is appropriate and the destination preserves U+210F.
- Use \hbar in an equation editor when mathematical spacing or structure matters.
- Define the local meaning when Reduced Planck Constant is used in physics, constants, quantum mechanics with a field-specific convention.
Look-alikes and related characters
- ∆ — Laplacian Symbol
- Å — Angstrom
- Ω — Ohm
Font and compatibility notes
Glyph shape can vary by font. Verify the code point after copying, and prefer LaTeX or MathML for structured equations.
Continue the workflow
From Reduced Planck Constant to a finished equation
- Copy the characterUse ℏ in plain text when Unicode is accepted.
- Choose a structured formatUse
\hbarfor LaTeX or the MathML snippet for accessible web equations. - Edit or convertOpen the value in the editor or converter without retyping it.
Review and source notes
Quality tier: specialist
Last reviewed: 2026-07-23
Review method: Catalog review of character identity and notation mappings.
Verified against: Unicode Standard, Unicode mathematical notation guidance, and established LaTeX/MathML syntax.
Reference sources
- The Unicode StandardUnicode Consortium — Character identity, encoding, names, and conformance.
- Unicode Character Code ChartsUnicode Consortium — Code points and official character charts.
Frequently asked questions
What does the Reduced Planck Constant symbol mean?
Represents the reduced Planck constant h divided by 2π.
What is the LaTeX command for ℏ?
Use \hbar in a compatible math environment.
Can I copy ℏ as Unicode?
Yes. Use the copy button above to copy the Unicode character directly.