How to read a ruler in cm

How To Use an English Ruler

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How To Use an English Ruler
What is 1cm on a ruler?
How do you read cm and MM on a ruler?
Where is the centimeter on a ruler?

Terminology
A ruler used to be called a rule, and rulers would be rules. Today, the more commonly found term is ruler. The dictionary defines both the term rule and ruler, so either can be used, and for this document I will only use the term ruler.

Metric Rulers
Metric rulers are fairly
easy to read. They deal with centimeters and millimeters only. You wont have to worry much about fractions.

Take a look at the following Metric Ruler.

The longer lines labled with numbers are centimeters, and the shorter lines are millimeters. Since millimeters are 1/10th of a centimeter, if you measure 7 marks after a centimeter, it is 1.7 centimeters long.

English Rulers
English rulers, are much more difficult to read. Mostly because they deal with fractions, which are a bit
more difficult to learn.

Take a look at the following English Rulers.

A ruler marked in 8ths. Every mark is 1/8th of an inch.

A ruler marked in 16ths. Every mark is 1/16th of an inch.

The center mark between numbers is 1/2.

The red lines on these rulers are marked at 1/2, and 1.

The next smallest marks on a ruler are 1/4ths.

The red marks on these rulers are at 1/4, 1/2, 3/4, and 1. (1/2 is the same as 2/4)

The next smallest marks on a ruler are 1/8ths.

The red marks on these rulers are at 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, and 1.

The next smallest mark, if there are any, are 1/16ths.

The red marks on this ruler are at 1/16, 1/8, 3/16, 1/4, 5/16, 3/8, 7/16,
1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, and 1.

When marking down a distance from a ruler, mark the whole inch, followed by a space, then the fraction of an inch.

For example, 1 1/2, or 2 3/8.

When entering fractions into the conversion calculators, you have to seperate the whole number and the fraction with a + sign.

For example, 1+1/2, or 2+3/8.

This information can be found @ OnlineConversion.com

If you need a printable ruler click http://www.vendian.org/mncharity/dir3/paper_rulers/

Most countries in the world use the metric system. Finding ways to use the metric system in your everyday life is the best way to learn it. When you need to use a ruler to measure something, it's a simple matter to read centimeter measurements.

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Get out your metric ruler and take a look at the lines. A metric ruler features two types of lines. The largest mark centimeters, or cm. The smallest lines mark millimeters, or mm. Keep in mind that there are 10 mm to 1 cm. The measurements are decimalized and there are no fractions.

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Line up your metric ruler against the object you wish to measure, with one end of the object aligned with the 0 point of the ruler.

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Count the number of centimeter lines from the beginning of the object to the end. For example, your object may be 9 cm long.

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Count the number of millimeter lines, if necessary. For example, your object may extend 8 millimeter lines beyond the 9 mark. Your object would then measure 9.8 cm long.

Tips

You can convert centimeter measurements into millimeter measurements by multiplying the number by 10. For example, an object that is 9.8 cm is also 98 mm.

Warnings

Do not be confused by the “mm” marking at the beginning of a metric ruler. Some may take this to mean that the larger lines are millimeter lines. The “mm” mark simply denotes the smaller lines.

What is 1cm on a ruler?

Each line represents 1 millimeter, which is equal to 1/10 or 0.1 cm (so 10 mm make up 1 cm). 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.

How do you read cm and MM on a ruler?

On a metric ruler, each individual line represents a millimeter (mm). The numbers on the ruler represent centimeters (cm). There are 10 millimeters for each centimeter.

Where is the centimeter on a ruler?

The long hash marks under which numbers are written on the ruler denote centimeters. A millimeter is even smaller than a centimeter. The smaller hash marks between each centimeter represent millimeters. 10-millimeter hash marks make 1 centimeter.