test.tex

\documentclass[12pt,twoside,letterpaper,titlepage]{report}

\usepackage{amssymb,amsmath}
\usepackage{mathspec}
\defaultfontfeatures{Ligatures=TeX,Scale=MatchLowercase}
\usepackage[margin=0.75in, top=1in]{geometry}
% fixltx2e has been merged into LaTeX2e proper
% see: https://latex-project.org/ltnews/ltnews22.pdf
% \usepackage{fixltx2e}
\usepackage{graphicx,grffile}
\makeatletter
\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi}
\def\maxheight{\ifdim\Gin@nat@height>\textheight\textheight\else\Gin@nat@height\fi}
\makeatother
% Scale images if necessary, so that they will not overflow the page
% margins by default, and it is still possible to overwrite the defaults
% using explicit options in \includegraphics[width, height, ...]{}
\setkeys{Gin}{width=\maxwidth,height=\maxheight,keepaspectratio}
\usepackage[table,svgnames]{xcolor}
\usepackage{framed}
\usepackage{longtable,booktabs}
\usepackage{listings}
\usepackage{enumitem}
\PassOptionsToPackage{hyphens}{url}\usepackage[breaklinks=true]{hyperref}

% Background Color for Note/Admonition Boxes
\definecolor{shadecolor}{rgb}{0.9,0.9,0.9}

% Band the Color of Rows in Tables
% unfortunately, doesn't seem to work across the board. Turning off for now
%\rowcolors{1}{white}{lightgray!25!white}

\newenvironment{callout}{\begin{shaded*}\small}{\end{shaded*}}
\newcommand{\warning}[1]{\small{\textbf{\textcolor[rgb]{0.8,0.2,0.2}{#1}}}}

% Font Settings
%\setmainfont[]{Calibri}
%\setmonofont[Mapping=tex-ansi]{Inconsolata}
%\usepackage{newtxtext,newtxmath}

% The depth of numbering for sections
\setcounter{secnumdepth}{4}

% Listing Settings
\lstset{
  backgroundcolor=\color{BlanchedAlmond!20!white},
  basicstyle=\ttfamily\scriptsize,
  breakatwhitespace=false,
  breaklines=true,
  frame=bottomline,
  keepspaces=true,
}

% Provide better table spacing
% From https://www.inf.ethz.ch/personal/markusp/teaching/guides/guide-tables.pdf
\renewcommand{\arraystretch}{1.2} 

\graphicspath{{media/}}

\pagestyle{headings}

% Define custom commands from Pandoc
\setlength{\emergencystretch}{3em}  % prevent overfull lines
\providecommand{\tightlist}{%
  \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}

% Redefine (sub)paragraphs to behave more like sections
\ifx\paragraph\undefined\else
\let\oldparagraph\paragraph
\renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
\fi
\ifx\subparagraph\undefined\else
\let\oldsubparagraph\subparagraph
\renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
\fi

% this is a great package for printing units in a standard way, we should move this way
\usepackage{siunitx}

% TODO: uncomment here
% The current implement of \degree doesn't use ensuremath, see https://github.com/josephwright/siunitx/issues/351
%\DeclareSIUnit[number-unit-product = \,]
%\degree{ \ensuremath { { } ^ { \circ } } }

% Add a few IP units, eg use like \SI{80}{\farenheit}
\DeclareSIUnit[number-unit-product = \,]
\farenheit{ \ensuremath { { } ^ { \circ } } \kern -\scriptspace F }

% some additional macros
\newcommand{\PB}[1]{\left(#1\right)}
\newcommand{\RB}[1]{\left[#1\right]}
\newcommand{\CB}[1]{\left\{#1\right\}}

\author{U.S. Department of Energy}
\date{September 30, 2016}

\title{Test}

\begin{document}

ang: \ang{180}
degree: \SI{180}{\degree}

Celsius: \SI{180}{\celsius}

\end{document}