Units for Measuring Length

Units for measuring length are discussed here.

We have different units of measurements to measure lengths. The bigger unit of measuring length is kilometer. Smaller measurement units are decimeter, centimeter and millimeter.

We know that the standard unit of length is ‘Meter’ which is written in short as ‘m’.

A meter length is divided into 100 equal parts.

Each part is named centimeter and written in short as ‘cm’.

Thus, 1 m = 100 cm and 100 cm = 1 m

The long distances are measured in kilometer. This kilometer equals to 1000 meters. The kilometer is written in short as km.

1 kilometer (km) = 1000 meters (m) and 1000 m = 1 km


The different units of length and their equivalents are given here:

1 kilometer (km)           

1 Hectometer (hm)  

1 Demetre (dcm)  

1 Meter (m)

1 Decimeter (dm)   

1 Centimeter (cm)   

= 10 Hectometers (hm) = 1000 m

= 10 Decathletes (dcm) = 100 m

= 10 Metres (m)

= 10 Decimeters (dm) = 100 cm = 1000 mm

= 10 Centimetres (cm)

= 10 Millimetres (mm)


Mostly we use Kilometer (km), Meter (m) and Centimeter (cm) as the units of length.

If you look at the ruler you can find that one centimeter is divided into 10 equal parts which are marked by smaller lines. Each line represents 1 millimeter. So, 10 millimeters is equal to 1 cm. 10 mm = 1 cm.

Units for Measuring Length

Millimeter is written in short form as mm. Smaller lengths such as thickness of a tile or card board are measured in millimeters.

If we divide 1 meter into 10 equal parts then each part is called a decimeter. It is written in short form as dm.

10 dm = 1 m

The higher unit to measure the length is kilometer. We know already that 1 kilometer = 1000 meters.

Standard Units of Length

Note: The set of standard units which we use is known as metric system.

To convert kilometer into meters we multiply by 1000 and meters into kilometer we divide by 1000.


The units for measuring length are cm, m and km. Sometimes when we measure the length of any object, it is not exactly up to the cm-mark.

Measurement of a Pencil

We can observe the length of pencil-ends between 0 and 8 cm. So, the length of the pencil is 8 cm.


Measuring Length from Different Points

If we have a broken ruler and we want to measure the length of an object, keep the object at any starting cm-mark and subtract it from ending cm-mark.

Measuring Length from Different Points

In the figure, you can see that starting cm-mark is 3 and ending cm mark is 8.

Now, subtract this to get the answer 8 cm - 3 cm = 5 cm. So, the length of the eraser is 5 cm.

The basic unit of length is meter (m). The smallest unit is millimeter while the largest is kilometre.

Units of Length:

10 millimeters (mm)

=

1 centimeter (cm)

10 centimeters (cm)

=

1 decimetre (dm)

10 decimeters (dm)

=

1 meter (m)

10 meters (m)

=

1 decametre (dam) 

10 decametres (dare)

=

1 hectometre (hm)

10 hectometers (hm)

=

1 kilometer (km)


1 m is taken as the basic unit of measuring length.

1 dam

=

10 m

1 hm

=

100 m

1 km

=

1000 m

1 dm

=

\(\frac{1}{10}\) m

1 cm

=

\(\frac{1}{100}\) m

1 mm

=

\(\frac{1}{1000}\) m


Worksheet on Measurement of Lengths:

1. Tick (the correct option unit would you like to measure the following:

Units of Length


Answer:

1. (i) (b) Metre

(ii) → (a) Centimetre

(iii) → (b) Metre

(iv) → (c) kilometre



You might like these

Related Concepts

Units for Measuring Length

Measuring Instruments

To Measure the Length of a Line-segment

Perimeter of a Figure

Unit of Mass or Weight

Examples on Unit of Mass or Weight

Units for The Measurement of Capacity

Examples on Measurement of Capacity

Measurement of Time

Read a Watch or a Clock

Antemeridian (a.m.) or Postmeridian (p.m.)

What Time it is?

Time in Hours and Minutes

24 Hour Clock

Units of Time

Examples Units of Time

Time Duration

Calendar

Reading and Interpreting a Calendar

Calendar Guides us to Know





4th Grade Math Activities

From Units for Measuring Length to HOME PAGE




Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.




Share this page: What’s this?

Recent Articles

  1. How to Do Long Division? | Method | Steps | Examples | Worksheets |Ans

    Apr 20, 25 11:46 AM

    Long Division and Short Division Forms
    As we know that the division is to distribute a given value or quantity into groups having equal values. In long division, values at the individual place (Thousands, Hundreds, Tens, Ones) are dividend…

    Read More

  2. Word Problems on Division | Examples on Word Problems on Division

    Apr 20, 25 11:17 AM

    Word Problem on Division
    Word problems on division for fourth grade students are solved here step by step. Consider the following examples on word problems involving division: 1. $5,876 are distributed equally among 26 men. H…

    Read More

  3. Subtraction of 4-Digit Numbers | Subtract Numbers with Four Digit

    Apr 20, 25 10:27 AM

    Properties of Subtraction of 4-Digit Numbers
    We will learn about the subtraction of 4-digit numbers (without borrowing and with borrowing). We know when one number is subtracted from another number the result obtained is called the difference.

    Read More

  4. Subtraction without Regrouping |4-Digit, 5-Digit & 6-Digit Subtraction

    Apr 20, 25 10:25 AM

    Subtraction without Regrouping
    We will learn subtracting 4-digit, 5-digit and 6-digit numbers without regrouping. We first arrange the numbers one below the other in place value columns and then subtract the digits under each colum…

    Read More

  5. Worksheets on Missing Numbers from 1 to 20 | Counting Missing Numbers

    Apr 20, 25 10:17 AM

    Printable worksheets on missing numbers
    Printable worksheets on missing numbers from 1 to 20 help the kids to practice counting of the numbers.

    Read More