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 centimetres | UK, Europe and Australia |
| Double-scale ruler | Inches along the top edge, centimetres 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 bank 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 centimetres — 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. Measure the printed scale against a bank card first. A US card is 3.37 in wide. Line one end up with the zero mark and the far end should land between 3.34 and 3.38 in.
| Reading at the card edge | Meaning | What to do |
|---|---|---|
| 3.34 to 3.38 in | The scale is correct | Ready to use |
| Under 3.34 in | The print was shrunk | Reprint at 100% |
| Over 3.38 in | The print was enlarged | Check the paper size setting |
No bank card to hand? A full sheet of Letter paper works too: its long edge measures exactly 11 in. The 100 mm square on the page is a second check: it should print at 100 mm on each side. If it does not, 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?
A home printer’s paper feed is usually accurate to a fraction of a percent. Across a 12 in ruler that can add up to roughly 1/32 in of drift. It is a mechanical limit, and no setting removes it.
- 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. If both are right and the ruler is still off, your printer’s paper feed is drifting.
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 centimetres 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 colour change the size?
No. The colour only changes how the markings look. A darker colour reproduces better on a monochrome printer.