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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 a piece of cloth and the ruler ends at the fourth line after the 10-inch mark. This would mean that the cloth is 10 1/4 (10.25) inches long. There have been huge advances in technology over the past decade, allowing for increasingly powerful assistive software to be created to help people overcome literacy difficulties. Sometimes however, the most effective tool that can be used is not complicated software, but instead something much simpler. 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. Rulers are an essential tool to have, but if you’re struggling with how to read a ruler, you're not alone. There are so many lines on a ruler, it can get confusing to figure out what they all mean.
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. Example: Say you decide to measure the length of a corn on the cob. You find that your ruler comes to the second line after the 6-inch mark. This would mean that the corn is 6 1/8 inches long. Let’s start by looking at how to read a ruler in inches. If you’re American, this is the measurement you probably know better than centimeters, which are sometimes included on your standard 12-inch, or 1-foot, ruler (we’ll go over how to read a ruler in cm in the next section). The middle-length line on a metric ruler is the 1/2 (0.5) centimeter line, which comes midway between every centimeter (in other words, it's the fifth line after every whole centimeter):If you want any extra assistance with learning how to read a ruler in cm or inches, videos and worksheets can be excellent resources. Also, be aware that 30 cm does not directly equal 12 inches, even though they are often put on the same ruler! Part of the Visual Stress Collection: a previous winning product of the Education Resources Awards SEN Resource of the Year. Example: You’re measuring the length of a strand of hair. The strand comes to the ninth line after 16 cm on the ruler. This would mean the strand is 16.9 cm long (that’s 16 cm + 9 mm).
Now, notice the lines between each inch, with some longer and some shorter than others. Each of these tiny lines represents a fraction of an inch. There are five different lengths of lines in total. Meanwhile, centimeters are part of the metric system, which is used around the world in both everyday life and science. Like the inches ruler, you’ll see tons of lines on a metric ruler, with some longer and some shorter. Each line represents 1 millimeter, which is equal to 1/10 or 0.1 cm (so 10 mm make up 1 cm). Tinted strips on the edge of the ruler and not as a central “letterbox”, ensuring that context is not lost.
While we will be providing pictures you can use to follow our instructions, we recommend getting out your own ruler or measuring tape so you can follow along in real time. These reading rulers are made of transparent plastic that both underlines the text by the use of an opaque line and highlights it in a coloured tint. One side of the ruler is gloss and the other matt. The longest line represents the biggest unit on the ruler: 1 cm. Each centimeter is labeled on the ruler (1-30). You’re measuring a pair of glasses, from the end of one lens to the far end of the other lens. Your ruler reaches the seventh line past 12 cm. How long is the pair of glasses? Finally, the smallest unit on a ruler is 1/16 inch.These tiny lines that represent 1/16 inch come between all 1/8-inch lines:
If you counted in 1/4 inches on a ruler, you'd see that the fourth line after 0 inches equals 1/4 inch, the eighth line equals 2/4 (1/2) inch, and the 12th line equals 3/4 inch.Inches correspond to the imperial system, which is the main measuring system used in the US and a smattering of other countries. If you counted in 1/8-inch increments, you'd find that the second line after 0 equals 1/8 inch, the fourth line 2/8 (1/4) inch, the sixth line 3/8 inch, the eighth line 4/8 (2/4 or 1/2) inch, the 10th line 5/8 inch, the 12th line 6/8 (3/4) inch, and the 14th line 7/8 inch. In this guide, we’ll explain why you should know how to read a ruler and give you step-by-step instructions on how to read a ruler in inches and cm. We’ll also provide you with some helpful resources you can use to keep honing your ruler-reading skills. Next is 1/8 inch, which is the second-smallest unit of a ruler. The 1/8 lines are found midway between each 1/4-inch line:
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