[Tex/LaTex] Too narrow S-column in siunitx

siunitxtables

I'm making a small table with numbers and units given with the \SI{num}{unit} call. However, the units stretches outside the table width, such that the booktabslines (or any other line) looks too short.

An MWE:

\documentclass[11pt, english]{article}

\usepackage{siunitx}
\usepackage{booktabs}
\newcommand{\m}{\hat{m}}

\begin{document}
\begin{table}[H]
    \centering
    \caption{Some table}
    \begin{tabular}{
    r
    c
    S[table-format = 3.2]
    }
        \toprule
        Beskrivelse & Variabel & {Verdi}  \\
        \midrule
        Temperaturer & $T_{\m_2}^\text{rev}$ & 558.3\si{\kelvin} \\
        & $T_{\m_4}^\text{rev}$ & 542.3\si{\kelvin} \\
        Reversibelt arbeid & $W_{s,1}^\text{rev}$ & 237.5\si{\kilo\watt} \\
                           & $W_{s,2}^\text{rev}$ & 213.4\si{\kilo\watt} \\
        Arbeid & $W_{s,1}$ & 339.3\si{\kilo\watt} \\
               & $W_{s,2}$ & 304.9\si{\kilo\watt} \\
        Totalt & $W_s$ & 644.2 \si{\kilo\watt} \\
        \bottomrule
    \end{tabular}
\end{table}
\end{document}

which produces the following

short_lines

As you can see, it doesn't look good. Any solution to this?

Best Answer

According the questions comments, the answer would be:

\documentclass[11pt, english]{article}  
\usepackage{siunitx}
\usepackage{booktabs}
\newcommand{\m}{\hat{m}}
\begin{document}
\begin{table}
    \centering
    \caption{Some table}
    \begin{tabular}{
    l
    c
    S[table-format = 3.1]      
    @{\,}
    s[table-unit-alignment = left]
    }
        \toprule
        Beskrivelse & Variabel & \multicolumn{2}{c}{Verdi} \\
        \midrule
        Temperaturer & $T_{\m_2}^\text{rev}$ & 558.3&\kelvin \\
        & $T_{\m_4}^\text{rev}$ & 542.3&\kelvin \\
        Reversibelt arbeid & $W_{s,1}^\text{rev}$ & 237.5&\kilo\watt \\
                           & $W_{s,2}^\text{rev}$ & 213.4&\kilo\watt \\
        Arbeid & $W_{s,1}$ & 339.3&\kilo\watt \\
               & $W_{s,2}$ & 304.9&\kilo\watt \\
        Totalt & $W_s$ & 644.2&\kilo\watt \\
        \bottomrule
    \end{tabular}
\end{table}
\end{document}

I find it strange to have the units centered and that far away from the numbers. For different mantissa lengths, this might be the correct way. But here, the mantissa is set to 3.2. The distance between number and unit can be shortened by the mantissa length 3.1. The alignment is changed by the column option table-unit-alignment=left (thanks to @Qrrbrbirlbel).

enter image description here

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