Consider the following piece of LaTeX code:
\begin{tabular}{p{1in}p{1in}}
A & B\\
C & D\\
\end{tabular}
How can I make the contents of each cell aligned in the center of the cell rather than the left? Note that I want to make sure that the widths of my columns are fixed, so I cannot use the "c" position attribute instead of "p{.1in}" to center my cell contents.
I think that this answer is the best source. You can declare the newcolumntype in the header and then use it when necessary:
\documentclass{article}
\usepackage{array}
\newcolumntype{C}[1]{>{\centering\let\newline\\\arraybackslash\hspace{0pt}}m{#1}}
\begin{document}
\begin{tabular}{|C{1in}|C{1in}|}
A & B\\
C & D\\
\end{tabular}
\end{document}
I only added the vertical lines | to make the column width (1in) and the centering more evident in the output:
