Measurement Units – Definition with Examples

Millimeter (mm)

Used to measure very short lengths or thicknesses.

Example, length of a pencil tip.

Centimeter (cm):

Used to measure small lengths.

Example: Length of a pencil.

Meter (m):

Used to measure big lengths.

Example: Length of a classroom.

Kilometer (km):

Used to measure very long lengths or distance.

Example: Distance between two places.

Inch (in):

Used to measure the length of small objects.

Example: Length of a bed.

Foot (ft):

Used to measure short distances and heights.

Example: Heights of buildings.

Yard (yd):

It is bigger than a foot.

Example: Length of a football field.

Mile (mi):

Used to measure long distances.

Example: Distance between two places.

Milligram (mg):

Used to measure very light things.

Example: Medicines

Gram (g): 

Used to measure small things.

Example: Potato

Kilogram (kg): 

Used to measure heavy things.

Example: Body weight

Ounce (oz): 

Used to measure small quantities.

Example: Bread.

Pound (lb): 

Used to measure body weight, etc.

Ton: 

Used to measure much heavier things.

Example: Trucks

Milliliter (ml):

Used to measure very small quantities.

Example: Medicines.

Liter (l): 

Used to measure liquids.

Example: juice, milk

Cup 

Pint

Quart

Gallon

Metric Units and US Standard Unit are the same for the time

Second (s)

Minute (min)

Hour (hr)

Day

Week

Month

Year

  Fun Fact

• Long before the standard units of measurement were made, non-standard units such as a digit, handspan, and pace were used.