Where is 12 on a ruler

The ruler I got was flat on both ends - a perfect rectangle. Classic Metal Ruler 5 out of 5 stars. Jocelyn - 3 months ago. Plastic rulers tend to break in the backpack with all those heavy books. Hopefully, this metal one will withstand a school year. Standard Metal Ruler 5 out of 5 stars. Kelly - 4 months ago. This is your standard metal ruler. It's metal on one side and has a cork material on the back.

It's simple and sturdy. I saw the review below and I had no issues with the markers on the actual ruler Did you? This ruler has the wrong inch measurements 1 out of 5 stars. Lulubee - 7 years ago. This ruler is cute, and the metal material works well, but the measurements on the inch side are inaccurate. The inch and half-inch markers are fine, but the rest was divided using the wrong multiples. So there are twentieths instead of sixteenths, and tenths instead of eighths.

The "quarter inch" is not the right length. This product should be recalled. Get top deals, latest trends, and more. Email address. Sign up. The inch is the biggest unit on a ruler and is represented by the longest line. Each 1-inch line is labeled with a number indicating what inch it is on the ruler as the image above shows. Example: If you were to measure the length of a sheet of computer paper, the piece of paper would come up to the inch mark on your ruler, indicating that it's exactly 11 inches long.

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. The ruler comes to the seventh line past 3 inches. Knowing how to read a ruler in cm is also helpful for people who'd prefer to not work with fractions which you must do with inches and who'd like to work with other units instead in this case, millimeters.

The standard metric ruler is 30 cm long. Each centimeter is labeled with a number to show the measurement it's referring to. 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.

Get more information on rulers , including different types and uses, or download and print one of our free printable rulers. 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. Get an inch ruler. You'll know it's an inch ruler because it will have 12 lines that denote inches on the ruler. Each foot is broken down into inches. Each inch is broken down into 15 smaller marks, equaling 16 marks in total for each inch on the ruler. Make sure you read the ruler from left to right. If you are measuring something, 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 inches.

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.