How long is that line? How wide is that suitcase? Will that box fit on this shelf? Questions like that are one of the few things you can't necessarily Google an answer to nowadays. But they can be solved with the aid of a simple measuring tool, the ruler, or its grown-up cousin the yardstick.
While some rulers will show only the US customary measures of inches and feet, most also have a metric side that measures length in millimeters and centimeters.
Before you start lining your ruler up and measuring things, take a look at the numbers running down the sides. If there are numbers on just one side of the ruler, they almost definitely show US customary measures: inches and feet.
If the ruler has measurements down both sides, one side will show US customary measures; look for the side where the larger marks inches are numbered up to The other side of the ruler will have markings for cm and mm measurement.
The distance between numbered marks on that side will be shorter than on the inches side, and the numbered marks will go as high as 30, because there are approximately 30 centimeters in 12 inches the length of the standard ruler.
Pixels per inch : , show ruler adjuster. Dragging ruler adjuster left or right to fit the size of your reference object, remember to save the setting for the next time you use it, after save the setting, refresh your brower to check the result. On the most popular browsers you can press the F5 key or click on the refresh button. We hope to provide a more user-friendly experience, are you willing to offer a native language version for your country?
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Victorian Antique Style. You might see inches on the other side of your metric ruler. In this case, refer to the instructions above to learn how to read a ruler in inches. Also, be aware that 30 cm does not directly equal 12 inches, even though they are often put on the same ruler!
There will always be 10 lines from one centimeter to the next centimeter. In total, there are three different lengths of lines on a metric ruler. The longest line represents the biggest unit on the ruler: 1 cm. Each centimeter is labeled on the ruler Example: You take out a ruler to measure the width of your fingernail.
The ruler stops at 1 cm, meaning that your nail is precisely 1 cm wide. Example: Say you're measuring the width of your smartphone, and it comes up to the fifth line after 4 cm on your ruler.
This would mean that the phone is 4. The smallest unit a metric ruler can measure is 1 mm, or 0. The strand comes to the ninth line after 16 cm on the ruler. This would mean the strand is If you want any extra assistance with learning how to read a ruler in cm or inches, videos and worksheets can be excellent resources.
All of these resources, in addition to the handful of practice questions we gave you above, should be enough to get you reading a ruler in no time at all! Got questions about decimals and fractions? Our expert guides will teach you how to convert decimals to fractions and how to add and subtract fractions.
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