# How can I get the deg^-1 symbol with siunitx package?

I need the following symbol:

I tried with:

\SI[]{5.73}{\per\deg}


But I want the negative power!

Can you help me?

• Just a curiosity. Where have you seen deg^-1 and what is the significance? Jul 13 at 19:37
• \qty{30}{deg^{-1}} (using siunitx v3), however, as said @Sebastiano, what is meaning/ significance of this unit? Jul 13 at 19:59
• I have to use it to indicate the slope of lift coefficient. Jul 13 at 20:00
• For example 5.4 1/deg. Jul 13 at 20:00
• @Giuseppe Looking on Wikipedia I see, lift slope is π^2/90 ≃ 0.11 per degree. en.wikipedia.org/wiki/Lift_coefficient Jul 13 at 20:07

The desired behavior is the default bahavior but it does not seem to be working for \deg. However, if you manually declare the unit

\DeclareSIUnit{\deg}{deg}


it seems to work just fine:

### Code:

\documentclass[12pt]{article}

\usepackage{siunitx}
\DeclareSIUnit{\deg}{deg}% <-- No exponent if this is not inclued

\begin{document}
$\SI{5.73}{\per\deg}$
\end{document}

• Great! Thank you very much! Jul 13 at 23:25
• I think \deg doesn't work as expected here is because it isn't actually a unit defined by siunitx. \deg is just the LaTeX default degree function (like \exp). With \DeclareSIUnit{\deg}{deg} you turn \deg into a siunitx unit. Jul 14 at 4:32
• @moewe: Ahhh, that makes sense. Thanks for the explanantion. Jul 14 at 8:46