Why Prints Come Out Smaller and How to Fix It: Printing Graph Paper and Patterns at Actual Size
You printed 5 mm graph paper, but a ruler says the squares are only 4.8 mm. A sewing pattern came out slightly too small. Almost every time, the cause is the printer or browser shrinking the page automatically with “fit to page”. This guide explains why the shrinking happens, how to print at actual size (100% scale) from a computer, a phone and a PDF, and how to check that it worked.
Prints shrink because of “fit to page”
Home printers can't put ink within about 3–5 mm of the edge of the paper. To keep content from being cut off in that zone, many apps and printer drivers turn on “fit to page” or “shrink to fit” by default, scaling the whole page down slightly.
For everyday documents you'd never notice a few percent of shrinkage, but for graph paper, sewing patterns or drawings, where the lengths themselves matter, it's a problem. Shrinking the 210 mm width of A4 to about 202 mm to avoid the unprintable margins is a scale of roughly 96%. 5 mm squares become about 4.8 mm, and across 40 squares you lose 8 mm.
| Scale | One 5 mm square | 10 squares | 50 mm ruler |
|---|---|---|---|
| 100% (actual size) | 5.0 mm | 50 mm | 50 mm |
| 97% | About 4.85 mm | About 48.5 mm | About 48.5 mm |
| 94% | About 4.7 mm | About 47 mm | About 47 mm |
| Borderless (about 102–103%) | About 5.1 mm | About 51 mm | About 51 mm |
Printing at actual size on a computer
The setting has different names in different browsers and apps, but you are looking for something like “Scale”, “Scaling” or “Size”. Choose “100%”, “Actual size” or “Original size”, and turn off “Fit to page” or “Fit to paper”.
| What you're printing | Where the setting is | What to choose |
|---|---|---|
| Chrome / Edge (web page) | “More settings” → “Scale” in the print dialog | “Default”, or “Custom” set to 100 |
| Safari / Mac (web page) | “Scale” in the print dialog | 100% |
| Acrobat Reader (PDF) | “Page Sizing & Handling” → “Size” | “Actual size” |
| Preview on Mac (PDF) | “Scale” options in the print dialog | “Scale” set to 100% |
| Printer driver | “Advanced” or “Page setup” | Borderless off, no enlarge/reduce |
Also check that the paper size matches the paper in the printer. Printing A4 content with the paper set to US Letter (215.9 × 279.4 mm) can shrink it because it's too short, and the reverse can happen when Letter content goes onto A4. Apps and printers often default to the paper size of the country they were made for, so watch out.
Tips for printing from a phone or at a print shop
Printing straight from a phone often has no scale option, and depending on the app or printer the page may be fitted to the paper automatically. When lengths matter, this order is the most reliable.
- 1
Save it as a PDF first
Choose “Save as PDF” as the destination in the print dialog, or use the share menu's “Print” and save the preview as a PDF. A PDF fixes the paper size and the scale.
- 2
Print from the printer maker's app
Open the PDF in the printer manufacturer's app and check the scaling and borderless settings. Many apps let you choose “100%” or “Actual size”.
- 3
At a print shop or kiosk, print the PDF at 100%
When printing a PDF at a copy shop or self-service kiosk, choose “100%” or “Actual size” if there is a scaling option, and use the same paper size as the original PDF.
Whichever method you use, check the ruler on the first sheet before printing more, and you won't waste paper and ink.
How to check that it printed at actual size
The surest way is to print a line of known length on the page and hold a ruler against it. The printable graph and lined paper maker can add a 50 mm check ruler at the bottom of the sheet.
- The 50 mm ruler is exactly 50 mm: it printed at actual size
- Around 48–49 mm: it was shrunk by “fit to page”. Set the scale back to 100%
- Around 51 mm: borderless printing or enlargement is on. Turn borderless off
- Different lengths horizontally and vertically: the printer's paper feed is off. Reload the paper or use the printer's alignment function
No ruler? A credit card (85.6 mm wide) works for a check too. Measuring across a longer span, such as 10 or 20 squares, reveals small errors you can't see in a single square. For patterns marked in inches (1 inch = 25.4 mm), see converting inches and centimetres.
How to make paper that prints at actual size easily
The printable graph and lined paper maker draws the sheet as an SVG in millimetres and, when printing, sets the paper size and zero margins in the page settings. So as long as the browser's print dialog is at 100% scale, 5 mm squares come out as 5 mm on paper.
- Keep margins at 5 mm or more: lines stay out of the area the printer can't reach, so nothing needs shrinking
- Add the check ruler: you can confirm with a ruler every time you print
- Save it as a PDF: next time just print the same PDF at 100%, including from a phone or a print shop
- Use SVG or PDF rather than an image: a PNG's printed size depends on its resolution, so SVG or PDF is better for printing
For choosing the square size and how many squares fit on each paper size, see what size graph paper squares to choose. For how image resolution relates to print size, see understanding dpi and resolution.
FAQ
- When I print graph paper, the squares come out smaller than 5 mm.
- “Fit to page” or “Shrink to fit” is turned on in the print settings. Set the scale to “100%” or “Actual size” in the print dialog. If A4 is shrunk to about 96%, 5 mm squares become about 4.8 mm.
- How do I print a PDF at actual size?
- In Acrobat Reader, choose “Actual size” under “Page Sizing & Handling” in the print dialog. In Preview on a Mac, set “Scale” to 100%. Choosing “Fit” or “Shrink” makes it smaller automatically.
- Does borderless printing change the size?
- Yes. Borderless printing enlarges the content slightly so it overflows the paper, which makes lengths a few percent longer and cuts off the edges. Turn borderless printing off for graph paper and patterns.
- How can I check that it printed at actual size?
- Print a line of known length and measure it with a ruler. The graph and lined paper maker can add a 50 mm ruler at the bottom; if it measures 50 mm, it's actual size. Without a ruler, the width of a credit card (85.6 mm) works too.
- Why do prints from my phone come out smaller?
- Phone printing often has no scale option, and some apps and printers fit the page to the paper automatically. Saving it as a PDF first and then printing at “100%” or “Actual size” from the printer's app or a print-shop kiosk is the reliable way.
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