Alignment of Gantt charts

Question

I have two Gantt charts using the pgfgantt package, and their typesetting is influenced by the longest label length. How can I make them aligned horizontally so that the left edge of the charts are aligned?

UPDATE: here is a minimal non-working example:

\documentclass{article}

\usepackage{pdflscape}
\usepackage{pgfgantt}

\begin{document}

\begin{landscape}
\vspace*{\fill}
\begin{ganttchart}[
    hgrid,
    vgrid,
    time slot format=isodate-yearmonth,
    time slot unit=month,
    x unit=3em
]{2025-11}{2026-10}
  \gantttitlecalendar{year, month=shortname} \\

  \ganttbar{xxxxxxxxxxxxxxxxxxxxxxx}{2025-11}{2026-06} \\
  \ganttbar{xxxxxxxxxxxxxxxxxxxxxxxxxx}{2026-07}{2026-07} \\
  \ganttbar{xxxxxxxxxxxxxxxxxxx}{2026-08}{2026-08} \\
  \ganttbar{xxxxxxxxxxxxxxxxxx}{2026-09}{2026-10} 

\end{ganttchart}

\vspace{3em}
\begin{ganttchart}[
    hgrid,
    vgrid,
    time slot format=isodate-yearmonth,
    time slot unit=month,
    x unit=3em
]{2026-11}{2027-10}
  \gantttitlecalendar{year, month=shortname} \\

  \ganttbar{xxxxxxxxxxxxx}{2026-11}{2027-10} 

\end{ganttchart}
\vspace*{\fill}
\end{landscape}

\end{document}

Answer 1

One option is to \usepackage{calc}, and then wrap any label in the second table in \makebox[\widthof{longest label from first table}][r]{actual label}. With yours, that ends up being:

\ganttbar{\makebox[\widthof{xxxxxxxxxxxxxxxxxxxxxxxxxx}][r]{xxxxxxxxxxxxx}}{2026-11}{2027-10}

Answer 2

You could right-align the charts. As long as the labels are short enough to fit in the line, their length won't matter:

\documentclass{article}

\usepackage{pdflscape}
\usepackage{pgfgantt}

\begin{document}

\begin{landscape}
\vspace*{\fill}
\raggedleft
\begin{ganttchart}[
    hgrid,
    vgrid,
    time slot format=isodate-yearmonth,
    time slot unit=month,
    x unit=3em
]{2025-11}{2026-10}
  \gantttitlecalendar{year, month=shortname} \\

  \ganttbar{xxxxxxxxxxxxxxxxxxxxxxx}{2025-11}{2026-06} \\
  \ganttbar{xxxxxxxxxxxxxxxxxxxxxxxxxx}{2026-07}{2026-07} \\
  \ganttbar{xxxxxxxxxxxxxxxxxxx}{2026-08}{2026-08} \\
  \ganttbar{xxxxxxxxxxxxxxxxxx}{2026-09}{2026-10} 

\end{ganttchart}

\vspace{3em}
\begin{ganttchart}[
    hgrid,
    vgrid,
    time slot format=isodate-yearmonth,
    time slot unit=month,
    x unit=3em
]{2026-11}{2027-10}
  \gantttitlecalendar{year, month=shortname} \\

  \ganttbar{xxxxxxxxxxxxx}{2026-11}{2027-10} 

\end{ganttchart}
\vspace*{\fill}
\end{landscape}

\end{document}