What you can print here
This page builds a one-to-one ruler you can print at home, cut out and put to work straight away. Choose a unit and a length, then make sure the paper setting matches the sheet actually loaded in the printer. Three scale styles are covered.
Each ruler is drawn live in the browser at the scale you set, so it does not follow your screen size. Once the print settings are right, the printed markings match a real ruler.
| Style | Graduations | Best for |
|---|---|---|
| Inch ruler | 1/16, 1/8, 1/4 and 1/2 inch | United States and Canada |
| Centimetre ruler | Millimetres and centimeters | UK, Europe and Australia |
| Double-scale ruler | Inches along the top edge, centimeters along the bottom | When you need both units |
Choosing the right paper size
A printable ruler only comes out at true size when the page and the printer agree on the paper. In North America that means Letter; almost everywhere else it means A4.
| Where you are | Standard | Size |
|---|---|---|
| United States and Canada | Letter | 8.5 × 11 in (215.9 × 279.4 mm) |
| UK, Europe, Australia | A4 | 8.27 × 11.69 in (210 × 297 mm) |
The paper size in your print dialog has to match the sheet in the tray. Pick the wrong one and the scale shifts across the whole ruler: the markings drift, and the print either runs off the edge of the sheet or stops short of it.
If you are not sure which sheet you have, measure it. Letter is 8.5 in wide and A4 is 8.27 in, a gap of about 6 mm.
A credit or debit card is 85.60 mm (3.37 in) wide in every country, fixed by ISO/IEC 7810, so it makes a reliable reference when you need to confirm a printed scale.
A double-scale ruler is useful when you work across both systems, for example checking an imported item against a local measure. This generator produces one unit at a time, so print two strips — one in inches and one in centimeters — and join them if you need both scales together.
Three print settings that matter
Scale at 100%. Print dialogs often default to “Fit to page”, “Shrink to fit” or “Scale to fit”. Those options squeeze the layout into the printable area, so every inch on paper comes out shorter than a real inch. Set the scale to 100% or “Actual size”.
Headers and footers off. They take roughly half an inch off the top and bottom of the sheet, so the ruler no longer starts near the paper edge.
Paper size matches the sheet in the tray. See the section above. A mismatch is the most common reason a ruler comes out at the wrong scale.
When the printed size is still wrong, the verification guide walks through the causes one by one.
Check the print before you cut
Do not cut it out straight away. Check the printed scale against a standard ID-1 payment card (credit or debit), whose long edge is 85.60 mm (about 3.37 in). Align one end with zero and see whether the other end is close to 3.37 in. If it is noticeably off, check the print scale and paper-size settings, then print the test square again.
| Reading at the card edge | Meaning | What to do |
|---|---|---|
| Close to 3.37 in | No obvious scale mismatch | Also check the 100 mm square |
| Noticeably under 3.37 in | The print may have been shrunk | Check scale and reprint |
| Noticeably over 3.37 in | The print may have been enlarged | Check paper size and reprint |
No payment card to hand? A sheet of US Letter paper has a nominal long edge of 11 in. The 100 mm square is a more direct scale check: measure both sides after printing. If either side is noticeably off, the page was rescaled somewhere between the browser and the printer.
Length and tick density
| Length | Typical use |
|---|---|
| 6 in | Pocket, pencil case, quick checks |
| 8 in | Palm-sized, general purpose |
| 12 in | Desk work, the standard US ruler length |
On tick density, sixteenths suit fine work while quarter-inch marks read faster at lower precision. The longer the ruler, the tighter the sixteenths become, so pick by what you are measuring.
A 6 in ruler slips into a pocket and covers envelopes and small parts. A 12 in ruler matches the standard school rule and handles most desk jobs. For anything longer, print two sections and butt them together at a numbered mark.
How accurate is a printed ruler?
Print accuracy varies with the printer, paper, driver, and feed mechanism, so a print dialog set to 100% does not guarantee every printed length will be exact. Measure the 100 mm test square in both directions and treat a printed ruler as approximate unless you verify it against a reliable physical standard. For tight tolerances, use a suitable precision tool.
- Print in several short sections, each starting again from zero, so the error does not accumulate.
- Switch to the on-screen online ruler and calibrate away the systematic error.
- Use a steel rule for anything critical.
Frequently asked questions
Why is my printed ruler the wrong size?
Check the print scale first: it should be 100%, not “Fit to page”. Then check the paper size and measure the 100 mm test square in both directions. If the square is still off, your printer or driver may be rescaling or feeding the page unevenly.
Should I choose Letter or A4?
Go by region. Letter in the United States and Canada, A4 nearly everywhere else.
Can I print an inch ruler?
Yes. Generate an inch ruler on its own, or a ruler with inches along one edge and centimeters along the other.
Can I choose a custom length?
Yes. Enter the length you need and generate the ruler.
How long will a paper ruler last?
Plain paper creases and tears. Print on heavier stock, or cover the ruler with a strip of clear tape.
Can I save the ruler as a PDF?
Yes. In the print dialog, choose “Save as PDF” instead of a printer, then reprint the file at 100% whenever you need a fresh copy.
Does the ink color change the size?
No. The color only changes how the markings look. A darker color reproduces better on a monochrome printer.