How do you type the h-bar(ℏ) symbol in LaTeX?

Writing the h-bar (ℏ) or Reduced Planck’s constant in LaTeX is very easy. Just use the \hbar command, and no extra packages are needed.

\[ \hbar = \frac{h}{2\pi} \]

\[ \hbar = \frac{h}{2\pi} \]

Besides this, the amsmath, fdsymbol, and boisik packages also provide the same \hbar command, which gives the same output.

A different style of h-bar

If you want a slightly different design for the h-bar symbol, you can use the boisik package. It gives an alternative version of ℏ.

\documentclass{article}
\usepackage{boisik}
\begin{document}
   \[ J^2 = j(j+1)^2 \hslash  \]
   \[ J_z = m \hslash \]
   \[ \Delta x . \Delta p \geq \frac{\hslash}{2} \]
\end{document}

Output :

More ways to write h-bar

Apart from \hbar, there are other ways to write ℏ in LaTeX. Some special packages like tipa, wsuipa, and phonetic also provide this symbol. Here are some alternative commands.

\documentclass{article}
\usepackage{tipa}
\begin{document}
   $ p^u = \textcrh K^u $\\[6pt]
   $ p^N $ = \planck $\left(\frac{w}{c}, \vec{K} \right) $\\[6pt]
   \crossh = 1.056 $ \times 10^{-34} J.S $
\end{document}

Output :

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