Reference
Graph paper
Graph paper is paper printed with a regular square grid, used for maths, drafting, data sketches and early interface design. The spacing decides how much the grid constrains the drawing; the paper weight decides whether your pen survives it. Our generator produces any metric or inch spacing as a true-scale PDF or an editable SVG.
Spacings
Common grid sizes
1 mm grid
Fine drafting and precise measurement transfer.
2 mm grid
Detailed sketching with subtle guidance.
5 mm grid
The classic school grid. Everyday notes and maths.
10 mm grid
Engineering layout, large diagrams, kids learning to write.
¼ inch (6.35 mm)
US "quad" paper — the imperial school standard.
⅛ inch (3.175 mm)
A finer imperial grid for technical work.
Major and minor lines
Most graph paper carries two line weights: a faint fine grid and a darker major grid every fifth or tenth line. The major grid is a counting aid — without it the eye loses count past four or five squares. The generator lets you set how many fine lines fall between majors, and the PDF download draws both weights as true vectors.
Printing accurately
For a grid to match a real ruler, print at 100 % / "Actual size" with no scaling. A "fit to page" print stretches every square by a few percent — invisible in text, fatal in a measuring grid. The generator's PDF keeps a 10 mm border inside the sheet so no printer's unprintable margin clips the grid.
Choosing paper and pens
Ordinary 75–80 gsm copier paper handles pencil and ballpoint without complaint. Gel ink and fountain pens feather and ghost on it — move to 90–100 gsm. Markers, brush pens and heavy fineliners want 120 gsm or more. For double-sided grids, treat 90 gsm as the floor whatever the pen, or the reverse grid gains a ghost of your work.
Tone matters too: a grid printed in light grey (as our generator draws it) recedes behind pen strokes, while full-black grids compete with the drawing. If the sheets will be photocopied or scanned, lighter grids also drop out more cleanly — the behaviour engineering paper was designed around.
Frequently asked questions
What is the difference between graph paper, quad paper and engineering paper?
Mostly naming, partly layout. "Graph paper" is the generic term; "quad" (quadrille) paper is the US name for the plain square grid, usually 4 or 5 squares per inch; "engineering paper" traditionally prints the grid on the back of the sheet so it shows through faintly and disappears when photocopied. The geometry — a square grid with optional heavier major lines — is the same.
What grid size should I use for maths homework?
5 mm in metric countries, ¼ inch in the US — one digit or symbol per square is the working convention. Younger children starting columnar arithmetic are usually happier on 7–10 mm squares.
Why does my printed grid measure slightly off?
The print dialog scaled it. "Fit to page", "Shrink to printable area" and similar options rescale by a few percent, which is invisible on text but ruins a measuring grid. Print at 100 % / "Actual size" — the PDF download from our generator is defined in millimetres precisely so that this setting produces a ruler-true grid.
What paper weight stops ink bleeding through?
Standard 75–80 gsm copier paper is fine for pencil and ballpoint. Gel pens and fountain pens want 90–100 gsm; markers and heavy fineliners need 120 gsm or more, or the grid on the next sheet gains ghost lines. If you print double-sided grids, go to at least 90 gsm regardless of pen.
Can this generator make dot grid or isometric paper?
No — it produces square grids (fine lines with configurable major lines) in metric or inch spacings. Dot grids and isometric (triangular) layouts are different geometries; for bullet-journal dot grids or isometric technical sketching, buy dedicated stock or use a specialised generator. We would rather say that plainly than pretend one tool covers everything.
What is the major-line interval for?
Counting. A heavier line every 5th or 10th square lets the eye count distances at a glance — 3 majors plus 2 squares reads instantly as 17 on a 5-square interval. Without majors, counting past four or five squares means putting a finger on the paper.
Is printed graph paper accurate enough for real measurement?
At 100 % scale on a healthy printer, yes for most purposes — desktop printers typically hold dimensions within a fraction of a millimetre across a page. Verify once with a ruler (our printable ruler PDF includes a check line for exactly this), and re-check if the printer has been serviced or the paper type changed.