I cannot figure out which of the siunitx
font options is the correct to typset the rangephrase when using SIrange
in math mode the same way as in text mode. See the MWE
\documentclass{book}
\usepackage{siunitx}
\sisetup{mode=text} % does NOT have an effect here
\begin{document}
\SIrange{1}{2}{\watt}\\
$\alpha=\SIrange{1}{2}{\watt}$
\end{document}
Best Answer
I am not sure why this is not the default behaviour, but if you specify
range-phrase = {\text{~to~}}
you get the same behavior in and out of math mode: