How to print a PDF at actual size
If a 5 mm grid measures 4.7 mm, nothing is wrong with the file — your print dialog is scaling. Here's why it happens and how to stop it, on every platform.
Why printers shrink your pages
Almost no printer can print to the very edge of a sheet — there's an unprintable border of 3–5 mm where the rollers grip. Print software "helpfully" handles this by defaulting to Fit to page, which shrinks the whole document until everything, margins included, fits inside the printable area. For a text document that's invisible. For graph paper, a ruler, a sewing pattern or a calendar grid, it quietly makes every measurement 3–6% wrong.
Every template on this site keeps its content inside a safe margin already, so nothing is lost by printing at full scale — the fix is purely a settings choice.
Where the setting lives
Adobe Acrobat / Acrobat Reader: Print dialog → Page Sizing & Handling → choose Actual size (not "Fit" or "Shrink oversized pages").
Browsers (Chrome, Edge, Firefox): Print → More settings → Scale → 100 (Chrome calls the alternative "Fit to printable area" — avoid it).
macOS Preview: Print → Scale 100%, and untick "Scale to fit" if shown.
Windows photo/PDF apps and phone apps: look for "Page size," "Scale" or "Fit" — anything that says Fit means scaling. Phones are the worst offenders; if you print from a phone, verify the first sheet (below) before printing twenty.
The 30-second verification
Print one sheet of 1 cm graph paper and lay a ruler across ten squares. Exactly 10 cm: your setup is accurate — everything else from this site will be too. About 9.5 cm: you're still on Fit-to-page. If you have no metric ruler, the quarter-inch grid works the same with an inch ruler: four squares to the inch.
When fit-to-page is actually right
Scaling only matters when physical size does. Calendars, planners, to-do lists and certificates can be printed at any scale that looks good — shrink a yearly calendar onto a notebook page freely. Reserve the 100%-scale discipline for anything you'll measure against: graph and dot paper, lined paper used for ruler work, and any template feeding sewing, woodworking or model-making.