% https://tex.stackexchange.com/a/356984/2288
% https://chat.stackexchange.com/transcript/message/53146989#53146989

\documentclass{article}

\usepackage{pgfplots}
\usepackage{siunitx}
\usepackage[type=none]{fgruler}

\usepackage[
a4paper , includeheadfoot , right = 10mm , left = 10mm , top = 0 mm, headheight = 0 mm, headsep = 5 mm, foot = 5 mm, bottom = 0 mm, showframe
]{geometry}

% http://tex.stackexchange.com/a/15002/100384
\newcommand*{\getlength}[2]{%
    % Convert to `cm` and round to two fractional digits:
    \pgfmathsetmacro#1{round(0.0351459804*#2)}%
}

\pagestyle{empty}

\begin{document}
    \vspace*{\fill}\vskip-\topskip
    \centering
    \begin{tikzpicture}
    \pgfmathsetmacro{\Hfactor}{0.95}% 0.9
    \pgfmathsetmacro{\Wfactor}{0.95}
    \getlength{\yMax}{\Hfactor*\textheight}
    \getlength{\xMax}{\Wfactor*\textwidth}
    \begin{axis}[
    set layers,
    width=\Wfactor\textwidth, height=\Hfactor\textheight,
    scale only axis, name=border,
    x = 1cm, y = 1cm,
    xtick={0,1,...,\xMax},
    ytick={0,1,...,\yMax},
    minor xtick={0,0.1,0.2,...,\xMax},
    minor ytick={0,0.1,0.2,...,\yMax},
    tick style = {line width = 0.6pt, black!40!white},
    minor tick style = {draw = none},
    major tick style = {draw = none},
    ticklabel style = {draw = none},
    xticklabels=\empty,
    yticklabels=\empty,
    axis line style = {-latex},
    grid = both,
    minor grid style={line width=0.2pt, black!20!white},
    major grid style={line width=0.6pt, black!60!white},
    ymin=0, ymax=\yMax,
    xmin=0, xmax=\xMax,
    ]
    \begin{pgfonlayer}{axis grid}
    \draw[line width=0.40pt, step=0.5cm, black!40!white] (axis cs: 0, 0) grid (axis cs: \xMax, \yMax);
    \end{pgfonlayer}
    \end{axis}
    %        \pgfresetboundingbox
    %        \path (border.south west) (border.north east);
    %        \draw[red] (current bounding box.south west) rectangle (current bounding box.north east);
    \end{tikzpicture}\vspace*{\fill}
    \fgruler{lowerleft}{10mm}{5mm}
    \fgruler{upperright}{10mm}{5mm}
\end{document}