Is there a symbol for 'Has Units of'?

Question

Is there a shorthand way to note that a variable has certain units? I vaguely recall using a boxed equals sign '[=]' as in:

x [=] feet

But I'm not sure if that's an accepted standard or if I made that up when were doing dimensional analysis in 10th grade.

Thanks!

Answer 1

I would argue that the box notation above would be used in the following context, for velocity $v$ $$[v ] = \frac{[L]}{[T]}$$

Where \begin{align} [L] &= m \\ [T] &= s \end{align} For units of length, $m$ in metres and time, T in seconds.

Answer 2

In addition to boxing the variable, $$[SA] = [m^2],$$ if you put your variable declarations before your work, in the heading, you can usually get away without the boxes, $$ D = \frac{kg}{m^3} $$ I've seen this done in several papers, sometimes bolded. As long as it is in the heading to avoid confusion with the rest of the work, such that it is clear that $kg$ and $m$ are not variables.