# [texhax] Units in technical writing

seelenhirt seelenhirt at gmx.net
Thu Dec 29 02:37:40 CET 2011

Hi Gordon

> Lately, I've been lazy and writing things like $3 mSv/a$ in LaTeX.
> And LaTeX ignores the space between the number and the unit.
>
> I have no problems with numbers with units being in math italic,
> or even writing chemistry in math mode and having chemical
> formulae in math italic.  But if one is introducing units, the
> introduction often doesn't have numbers to it (W = J / s), and
> sometimes one forgets to put everything in math mode.
>
> I'm in the habit of \usepackage{isotope} now.  Is there a similar
> package which allows for nicely typesetting values with units
> (possibly with error estimates)?
>
> I hope everyone had a good Christmas.
>

The easy way is to use \, for the space and \text for units e.g.
$1\,\text{W}$. There are some packages for typesetting units. Have a
look at siunitx.

Regards,