Graph paper and millimetre paper to print

An online generator for printable paper: squares, millimetre paper, dots, isometric, hexagons, ruled lines, music staves, tablature, handwriting guides, Cornell notes, polar and semi-log grids. The file is assembled straight into vector PDF at true page size, so the squares on paper come out exactly the size you asked for.

How to use it

1
Pick a paper type

Squares, millimetre paper, dots, isometric, music staves, handwriting guides and more. The preview updates immediately and shows exactly what will print.

2
Set the sizes

Square size in millimetres, sheet size, margins and, if you need them, extra room for hole punches. A paler line colour helps if you will be writing over the grid.

3
Calibrate the printer once

Download the calibration sheet, print it at 100 %, measure the reference line with a ruler — its length is printed on the sheet and enter what you measured. The correction is remembered in your browser.

4
Download the PDF

In the print dialog choose “Actual size” or 100 % and turn off “Fit to page” — otherwise the correction lands on top of somebody else’s scaling.

5
Check it with a ruler

Hold a ruler against the printed sheet: ten 5 mm squares should span exactly 50 mm. If they do not, run the calibration again — most likely fit-to-page is still on.

Print ruling at an exact square size — from millimetre paper to music staves

Preview

The preview is drawn by the same code as the file, so it shows exactly what will print.

Printer calibration

Browsers and drivers shrink the page to fit by default, which is why squares come out 3–5 % small. Print the calibration sheet once, measure the printed line with a ruler and enter the result — every file after that comes out exact.

Why a PNG will not do

An image has no physical size: it prints at whatever scale the page layout and the printer driver agree on. For a background nobody notices. For millimetre paper it is fatal — a 4.7 mm square looks exactly like a 5 mm one and there is nothing to check it against. Here the sheet is assembled straight into PDF, where one millimetre is exactly 72/25.4 points and the page really is A4 or Letter.

Features

Vector PDF with exact millimetres, not an image
One millimetre is exactly 72/25.4 points and the sheet is a true A4, A3, A5 or Letter. The geometry is tested in millimetres: the worst square-width error across a sheet stays within two microns, and the file is additionally opened with a third-party PDF library so it is readable by more than just us.
Calibrate your printer with a single sheet
Print a sheet with a reference line, measure it with an ordinary ruler, type the result — and the correction applies to every file afterwards. Scaling happens about the centre of the sheet, so the error is spread symmetrically instead of pushing the grid several millimetres toward one edge.
Twelve paper types, including ones you normally have to buy
Proper millimetre paper with three line weights (1, 5 and 10 mm), isometric for 3-D sketching, hexagons, music staves and guitar tablature, handwriting guides with an adjustable slant, Cornell notes, polar and semi-logarithmic grids.
The preview runs the same code as the file
Screen and PDF share the same drawing functions; only the output device differs. The preview therefore cannot drift from the print — a mismatch would require two independent geometry implementations, and there is exactly one.
Margins, binding room, colour and line weight
A separate binding margin shifts the ruling without narrowing it from the other side. The line colour is free: a pale blue grid saves toner and stays out of the way of whatever you write on top of it.
Multi-page files and PNG at 150–600 DPI
Up to fifty pages in one file, so you are not printing them one at a time. If you actually need an image — as a backdrop in a drawing app, say — there is a PNG export with a choice of resolution.

Questions and answers

Why are the squares smaller than I asked for?

Almost always “fit to printable area” in the print dialog: the driver shrinks the page by 3–5 % to clear the printer’s own margins. Choose 100 % or “Actual size”. If an error remains after that, it is mechanical, and one calibration sheet removes it.

Why is this better than an image of graph paper?

An image has no physical size: how many millimetres its pixel occupies is decided by the layout and the driver. A PDF states the page size and the coordinates in points, so a millimetre stays a millimetre. You can check that with a ruler — which is exactly what our tests do.

Do I have to calibrate every time?

No. The correction is stored in your browser and applies to every subsequent file. Repeat it when you change printers, or if you notice the print drifting again.

What counts as proper millimetre paper?

A 1 mm grid where every fifth line is heavier and every tenth heavier still. The three weights are not decoration: they let you count squares at a glance instead of one by one. Here they are specified in millimetres — 0.07, 0.18 and 0.3 mm.

Can I print a pale grid on a colour printer?

Yes, the line colour is yours to choose. Pale blue is the classic drafting choice: visible while you work, almost invisible under what you draw on top, and noticeably lighter on toner.

Why is the calibration sheet in English?

The file embeds a single standard font that only covers the Latin alphabet. Printing Cyrillic or Hangul through it would produce garbage on paper, so the sheet’s labels stay Latin and every explanation lives on this page.

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Who is this tool for?
🎓 Students 📚 Educators & Teachers
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