Graph paper generator

Set the square size, the margin and how often a heavier line appears, check the live preview and download a PDF for A4 or Letter. Use 1 mm squares with a heavy line every 10 for millimetre paper. Nothing is uploaded.

Runs in your browser: nothing you enter is sent anywhere.

How to use it

  1. Pick A4 or Letter, portrait or landscape and the units.
  2. Enter the square size and the margin. Set a heavier line every N squares, or 0 for none.
  3. Check the preview, then press Download PDF or print the preview directly.

How it works

The usable area is the page minus the margins. The tool fits as many whole squares as it can in each direction, centres that block on the page and draws one line per square edge. Every Nth line is drawn thicker and darker; the rest are thin and lighter.

Example

A4 portrait, 5 mm squares and a 10 mm margin: the usable area is 190 × 277 mm, which fits 38 columns and 55 rows. That is 39 vertical and 56 horizontal lines.

Tips

  • For engineering notes try 5 mm squares with a heavier line every 5 squares (25 mm).
  • Print at 100% or “actual size”: scaling to fit changes the square size.

Frequently asked questions

How do I make millimetre paper?

Choose millimetres, set the square size to 1 and the heavier line to every 10 squares. The PDF then has 1 mm squares with a stronger line every centimetre. Very small squares need a good printer to look clean.

Why does the grid not reach the page edges?

Only whole squares are drawn, and the grid block is centred inside the margin you set. With a 5 mm square and 10 mm margin on A4 you get 38 by 55 squares.

Can I use inches?

Yes. Switch the units to inches and the square size, such as 0.25 in, and margin are read in inches. Values are converted when you switch, so 5 mm becomes 0.2 in.

Is anything sent to a server?

No. The sheet is drawn in your browser with the pdf-lib library and saved as a file on your device.

More in PDF

All tools in this category: PDF ·Updated November 3, 2026

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