How to use it
- Pick the kind of paper: square grid, dot grid, lined, isometric or hexagon.
- Choose a spacing preset or type your own in inches or millimeters (fractions such as 9/32 work), then the paper size, orientation and margin.
- For square grids and dot grids, set how often a bolder line or dot appears, for example every 4 squares on quarter-inch paper so each inch is outlined.
- Press Download PDF (or Open PDF to print), and print at 100% or “Actual size”. Use Download SVG to edit the grid in a design program.
Exact size, not just a picture of a grid
The PDF is written by the page itself as vector lines in points, the unit PDF uses (72 points to the inch, so one millimeter is 72 ÷ 25.4 points). Nothing is drawn as an image, so lines stay sharp at any zoom and each square measures exactly the spacing you chose when it is printed at full size. The grid holds whole squares only and is centered inside your margin, so the leftover space is shared equally on both sides: quarter-inch paper on US Letter with a 0.4 inch margin is 30 by 40 squares, a 7.5 by 10 inch grid.
Printers cannot print to the very edge, which is why there is a margin, and most print dialogs offer to scale a page to fit the printable area. That shrinks everything slightly: a quarter-inch square printed at 94% is 0.235 in. Choose “Actual size”, “100%” or “None” for scaling, then measure a row of ten squares with a ruler to check your printer.
Which paper for which job
| Paper | Common spacing | Used for |
|---|---|---|
| Square grid | 1/4 in (4 squares per inch), 5 mm, 1 cm, 1 mm | math, charts, floor plans, knitting and cross-stitch patterns |
| Engineering | 1/5 or 1/10 in with a bold line every inch, 1 mm with bold every 10 mm | technical sketches and scale drawings |
| Dot grid | 5 mm | bullet journals, lettering, sketching UI layouts; the dots guide without competing with what you draw |
| Lined | wide ruled 11/32 in (8.7 mm), college ruled 9/32 in (7.1 mm), narrow 1/4 in; a red margin about 1¼ in from the left | handwriting and notes; wide ruled for younger writers |
| Isometric | 5 mm triangles | 3D sketches of objects and rooms: each line runs vertically or at 30° to the horizontal, the angles of an isometric drawing |
| Hexagon | 1/4 to 1/2 in sides | tabletop game maps, molecule drawings, quilting |
On isometric paper the spacing you enter is the side of each triangle. The vertical lines are then that side times √3 ÷ 2 apart (4.33 mm for 5 mm triangles), and the slanted lines are spaced the same, so all three directions match. On hexagon paper it is the length of one side, which is also the distance from the center of a hexagon to each corner.
What we tested
On October 15, 2026 we built 102 PDFs with the page’s own code (every paper type in six paper sizes, both orientations, inches and millimeters, 1 to 5 pages) and read them back with independent tools: qpdf found no structural errors in any of them; pypdf confirmed every page size and page count; and all 36,496 lines and 27,151 dots were parsed out of the files and measured. Every grid had whole squares at exactly the chosen spacing (within 0.002 points, about a thousandth of a millimeter), sat centered with nothing inside the margins, and had its bold lines in the right places; every isometric line ran vertically or at exactly 30° either side of horizontal, through the triangle corners; every hexagon edge had the chosen length with no edge drawn twice. Rasterized at 300 dpi, quarter-inch grid lines sat exactly 75 pixels apart across a 10-inch grid. In Chromium: the default quarter-inch grid on Letter showed 30 × 40 squares, grid 7.5 × 10 in, and its PDF, compressed by the browser itself, passed qpdf at exactly 612 × 792 points; the SVG came out at 215.9 × 279.4 mm; all five paper types drew a preview; 1 cm squares on A4 landscape gave 27 × 19 squares and a 3-page PDF of 841.89 × 595.276 points; a typed 9/32 in line spacing on that page gave 26 lines; a spacing too large for the page showed a message and disabled the downloads; settings survived a reload; the page fitted a 390 px phone with no errors. We also checked the check: tilting the isometric lines to 29° made every isometric case fail.
Tips
- For 3D sketches, isometric dot paper is easy to make: print the isometric grid in a very light gray, or a 5 mm dot grid and connect dots at 30°.
- Light colors like the default blue print as a faint guide on a laser printer; choose a darker color if your printer drops very light lines.
- Set Pages to the number of sheets you need and the PDF repeats the page, which keeps the file small (each page shares the same drawing).
- In millimeter mode, 5 mm squares with a bold line every 2 squares give the familiar 1 cm graph paper with 5 mm subdivisions.
Sources
Checked on .
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools