Vendian should be the first place you go when looking for a free printable ruler because they have a whopping 20 of them in every type of measurement you'll ever need.
Their printable rulers are available in foot, metric, centimeter/inch, narrow, yard, meter, large-print, single-unit, color square, and number in different lengths and styles. There are also number free rulers that are great for teaching kids about measurement.
You also have a lot of options on how many rulers you can print per page. There are options for 1, 6, 9, 10, 13, 16, and 21.
The printable rulers at Vendian's can be downloaded as a .PDF or .PS (PostScript) file.
The printable rulers here are a little more fashionable with either a metallic or transparent look, which are both available to print on Letter or A4 paper.
There are measuring tape rulers, centimeter rulers, inches rulers to varying scales, whole and quarter inch rulers, protractors, and more.
The cutting lines around the ruler make it easy to cut out the printable ruler neatly and accurately.
Click on the image of the ruler you'd like to print and it will open as a PDF file. After you print, you can follow the directions on Printable-Ruler.net (on the right side of the page) on how to test your ruler to make sure it is accurate.
In just a single page you can get two printable rulers (one in inch, one in centimeter) and a printable protractor from TeacherVision.
Although this printable is meant for students it can work for anyone who's looking for a good printable paper ruler.
Like the others in this list, this free printable ruler downloads as a PDF file. See these free PDF readers you can install if you don't know how to open a PDF file.
You can print paper rulers here in inches, centimeters, or a combination of the two. You can even print a few of these rules on a single page, which is convenient if you're looking for more than one printable ruler.
If you're using these printable rulers as a teaching tool, there are also videos and worksheets on how to read a ruler and use a ruler.
These printable rulers open as PDF files.
You can download some more free printable rulers in the PDF format from PrintableRulers.net. There are currently over 60 rulers available for download here.
The PrintableRulers.net homepage shows the 15 most popular rulers on their site. Some of these printable rules include a meterstick, 15-cm mm ruler, yardstick, square, and a 12-inch by 1/10 inch ruler.
There are also some engineering rulers, business card rulers, and measuring tape.
Here's a giant printable ruler that's meant to be used as a growth chart. It measures by inches and feet, making it easy to mark how tall your child is.
You'll print the ruler on 5 different pages and then tape the pages together to make the growth chart.
If you're creating or modifying clothes, these free printable rulers are just what you need.
There are five free rulers here that include Imperial French curve, Imperial hip cure, metric French curves, and metric hip curve.
91 Free Printable Rulers
Printable Rulers In Actual Size
The convenience of a printable ruler is something that I've taken advantage of more times than I can remember. I'm frequently misplacing my rulers and measuring tape and the quick print of a free printable ruler gets me going in quicker time than it would take to hunt down the actual ruler.
The printable rulers are in just about every different form imaginable including rulers in actual size to measure feet, centimeters, inches, and metric measurements. There are your standard rulers but also rulers such as protractors, growth charts, and French and hip curve rulers.
Printable rulers are also very convenient because they are more flexible than a plastic, wood, or metal ruler because you can bend them to measure just about anything.
If you're teaching your child or students about units of measurements then these printable rulers can really help with that and with them being paper, they can even decorate them to make the activity a bit more fun.
These rulers are actual size so you'll want to take care to keep them that way when you print. When printing a paper ruler make sure that you do not have the shrink to fit option turned on, and page scaling should be set to none before you print. This will print the ruler at actual size with accurate units.
If you're looking for a sturdier printable ruler, try printing the ruler on cardstock instead of printer paper. You also might like this free, printable graph paper available.