Grid paper

Pick the square size and the orientation and that is it. The spacing is nudged so the sheet fills exactly, with no half square left at the edge.

37 across × 55 down fit exactly on one A4 page. Check that the orientation in the print dialog matches the setting above.

Choose a square size and an orientation and that is it. The spacing is nudged so the page fills with whole squares rather than leaving a half square at the edge.

No half square at the edge

Drawn at exactly 5mm, the last square across an A4 page gets cut off — and a half square ruins the sheet for any drawing where you count. So the spacing is adjusted very slightly from the size you picked until whole squares fit.

5mm is the school size

Maths and science exercise books are usually 5mm. Use 3mm for dense graphs and 10mm for large handwriting or floor plans.

Light lines, one weight

Some grid paper thickens every fifth line. It is left out here: a heavy line pulls whatever you draw towards it, which gets in the way of free drawing.

3mm is for graphs

Ten 3mm squares make 30mm, a fine enough scale to use one square per unit when plotting a function or experimental data. Lines that close together look lighter, so turn off the printer's draft mode.

The last square is closed too

A repeating pattern normally loses the line at the right and bottom edges. Here those two sides are closed with a border, so no edge square is left open. When you count squares for a drawing, an open edge square is ambiguous — one square or half.

How many squares fit

The printable area is 186×273mm, so 5mm gives 37 by 55 squares, 10mm gives 19 by 27, and 3mm gives 62 by 91. The spacing is adjusted to those counts, so choosing 10mm actually gives 9.79×10.11mm. That is fine for counting square centimetres in an area lesson, but a ruler check will show a difference of about 0.2mm.

A blank page means check background printing

The grid is the sheet's background pattern, not lines drawn on the page. The page tells the browser to print backgrounds regardless, but old browsers and some PDF printer drivers ignore that. If the preview shows squares and the paper shows only the outer border, turn on background graphics in the print dialog or use another browser.

The preview is not for measuring

The sheet on screen is shrunk to fit the window, so a square there is not really 5mm; only the proportions match, and only printing gives the size you chose. The orientation in the print dialog must match the one chosen on screen, or the square count will differ from what the screen says.

Common questions

Is a square exactly 5mm?

It is nudged so whole squares fill the page. A ruler may show a fraction of a millimetre difference, but for counting squares that is the more accurate result.

The printed squares came out smaller.

Check that the print dialog is at 100%. "Fit to page" shrinks everything by the margin.

Can I add axes?

No axes are drawn. Where the origin belongs differs with every drawing, so it is quicker to add them with a ruler afterwards.

I want it wider.

Switch to landscape and more squares fit across. The square size does not change.

Can I use it for writing practice?

Two 5mm squares per character give 10mm letters. For Chinese characters with many strokes, the squares keep the proportions steadier than ruled paper.

Are there name and date fields?

Turn on the header and a space appears at the top, at the cost of a few rows of squares.

Can every fifth line be heavier?

No; the lines are one weight. For a larger unit, rule a line every five squares after printing, or choose 10mm from the start.

What happens with Letter paper?

The sheet is laid out for A4. Letter is 6mm wider and 18mm shorter, so printed as-is the bottom is cut off or the browser scales it down. Choose A4 in the print dialog first; if Letter is all you have, turn on fit-to-page and accept slightly smaller squares.