How to Create Tables in LaTeX

From basic grids to publication-quality tables with booktabs.

Basic Tables

Tables in LaTeX are created with the tabular environment. You define columns in the argument, separate cells with &, end rows with \\, and add horizontal lines with \hline:

\begin{tabular}{l c r}
    \hline
    Name   & Age & Score \\
    \hline
    Alice  & 23  & 95    \\
    Bob    & 27  & 88    \\
    Claire & 21  & 92    \\
    \hline
\end{tabular}

This produces a three-column table with the first column left-aligned, the second centered, and the third right-aligned.

Column Alignment

The column specification string accepts these alignment options:

• l -- left-aligned
• c -- centered
• r -- right-aligned
• p{width} -- paragraph column with fixed width (text wraps)
• | -- vertical line between columns

% Table with vertical lines and a paragraph column:
\begin{tabular}{|l|c|p{6cm}|}
    \hline
    Feature & Status & Description \\
    \hline
    Speed   & Fast   & Compiles documents in under a second
                       on modern hardware. \\
    \hline
    Quality & High   & Produces publication-ready output with
                       professional typography. \\
    \hline
\end{tabular}

Professional Tables with Booktabs

The booktabs package replaces \hline with three commands that produce cleaner, more professional horizontal rules. Most journals and publishers prefer this style:

\usepackage{booktabs}

% In the document body:
\begin{tabular}{lcc}
    \toprule
    Method   & Precision & Recall \\
    \midrule
    Baseline & 0.72      & 0.68  \\
    Ours     & 0.89      & 0.85  \\
    Ours+    & 0.93      & 0.91  \\
    \bottomrule
\end{tabular}

Use \toprule at the top, \midrule after the header row, and \bottomrule at the bottom. Avoid vertical lines when using booktabs -- the clean horizontal rules are sufficient.

Multicolumn and Multirow

To span a cell across multiple columns, use \multicolumn. For spanning rows, use the multirow package:

\usepackage{multirow}
\usepackage{booktabs}

\begin{tabular}{lccc}
    \toprule
    \multirow{2}{*}{Model} & \multicolumn{3}{c}{Metrics} \\
    \cmidrule(lr){2-4}
                          & Accuracy & F1    & AUC  \\
    \midrule
    Linear                & 0.78     & 0.75  & 0.82 \\
    Neural Net            & 0.91     & 0.89  & 0.94 \\
    \bottomrule
\end{tabular}

The \multicolumn{3}{c}{Metrics} command merges three cells and centers the label. The \cmidrule(lr){2-4} adds a partial rule under columns 2 through 4 with trimmed ends.

Table Positioning

Wrap your tabular in a table environment to make it a floating element with a caption and label for cross-referencing:

\begin{table}[h]
    \centering
    \caption{Experimental results on the test set.}
    \label{tab:results}
    \begin{tabular}{lcc}
        \toprule
        Method & Accuracy & Speed (ms) \\
        \midrule
        A      & 92.3     & 12         \\
        B      & 94.1     & 18         \\
        \bottomrule
    \end{tabular}
\end{table}

The placement specifier [h] suggests placing the table "here." Other options are [t] (top), [b] (bottom), and [p] (dedicated float page). You can reference the table with \ref{tab:results} elsewhere in your document.

Common Mistakes

• Missing \\ at end of rows -- every row except the last before \end{tabular} needs a row terminator, though adding one on the last row is harmless.
• Wrong number of & separators -- each row must have exactly one fewer & than the number of columns.
• Using \hline with booktabs -- do not mix \hline with \toprule/\midrule/\bottomrule. Choose one style.
• Forgetting \centering -- without it, tables left-align within the float, which usually looks odd.