Here’s a 12 inch printable ruler that you can download and print out. Click on any of the ruler thumbnails below to open up the printable ruler pdf. When you print this, do not press “scale to fit” since this will distort the size of the ruler. If you’re printing on 8.5 x 11 paper, the ruler will fit on the paper without getting cut off at the margins.
12-Inch Printable Rulers
Information About the United States Customary Units
Here’s some useful facts about the United States System of Measurement:
1. The US System of units is derived from English units, as system that has its roots in Roman and Anglo-Saxon units.
2. Only the United States, Liberia, and Burma use the United States Customary units.
3. The basic units of measurement in the USA are the inch, foot, yard and mile.
4. One inch = 2.54 centimeters (cm)
5. One centimeter = 0.393701 inch (in.)
6. One foot = 12 inches
7. One yard = 3 feet (36 inches)
8. One mile = 5,280 feet (1760 yards, 63360 inches)
9. The circumference of the Earth at the equator is about 24,901 miles.
10. While the American Customary units are used in the household, the metric system is widely used in the areas of science, military, and industry.