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. Metric rulers usually have only centimeters and millimeters on them. But did you know there's an even tinier unit called nanometers? Learn how to convert nanometers to meters and other measurements with our in-depth guide.
Ever seen Roman numerals but didn't know how to read them? Check out our detailed guide and you'll be on your way to understanding this ancient numerical system! Click to see full answer. In total, there are 96 of these marks on a 12 inch ruler.
Lay down the ruler so that 0 is at the origin, and the 3 inch mark is on the perpendicular somewhere. When marking down a distance from a ruler , mark the whole inch , followed by a space, then the fraction of an inch. Learn the inch marks. A ruler is made up of 12 inch marks. These are typically the numbered marks on the ruler and are denoted by the longest lines on the ruler.
For example, if you need to measure a nail, place one end directly on the left side of the ruler. If it ends directly above the long line next to the large number 5, then the nail is 5 inches long.
In total, there are 24 of these marks on a 12 inch ruler. Mark where the tip of the pencil lead ends on the ruler. There are a total of 48 of these marks on a 12 inch ruler. In total, there are 96 of these marks on a 12 inch ruler. These are also the smallest lines on the ruler. There are a total of of these lines on the ruler.
If you plan on measuring things that are small or you need to be extremely accurate, make sure the ruler you use has these marks. Method 2. Get a metric ruler. A metric ruler is based on the International System of Units SI , sometimes called the metric system, and is divded into either millimeters or centimeters instead of inches.
Rulers are often 30 centimeters long, which are designated by large numbers on the ruler. Between each centimeter cm mark, there should be 10 smaller marks called millimeters mm.
If you are measuring an object, align it with the left side of the zero mark on the ruler. The left side of the line where the object ends will be its measurement in centimeters. This way the line thickness will not affect the measurement.
Unlike with the English ruler, the measurements for the metric ruler are written in decimals instead of fractions. Learn the centimeter marks.
The large numbers next to the longest lines on the ruler denote the centimeter marks. A metric ruler has 30 of these marks. For example, place the bottom of a crayon on the far left side of the ruler to measure it. Note where the tip falls. If the crayon ends directly on the long line next to the large number 14, your crayon is exactly 14cm long. There are a total of 60 of these marks on a 30 cm ruler. Your button is 1. For example, to measure 0.
Learn the millimeter marks. Between each 0. There are a total of 10 lines per centimeter, with the 0. There are millimeter marks on a 30 cm ruler. The The markings on a standard ruler represent the fractions of an inch. These are the measurements and fractions that are on a ruler and the decimal and millimeter metric equivalents. If you need to convert larger inch fractions to decimal or metric, use our inch fraction calculator.
You are here. Reading a ruler starts with understanding what all the ticks mean.
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