# Understanding metric units. Choosing the most suitable metric unit of measurement in different situations.

Thought I would write this hub to help you understand metric measurements of length, weight and volume. The main metric units of length are:

millimetres (1 mm is about the width of a tip of a pencil)

centimetres (1 cm is about the length of a fingernail)

metres (1m is about the height of a young child)

kilometres (1 km is the distance around 2 ½ athletic tracks)

The main metric units of weight are:

grams (1g is about the weight of a small insect)

kilograms (1kg is about the weight of a bag of sugar or flour)

ton (1 ton is about the weight of an elephant)

The main metric units of volume (capacity) are:

millilitres (1ml is about the volume of small water drop)

centilitres (1cl is about the volume of a mouthful of water)

litres (1l is about the volume of a carton of milk)

Let’s take a look at some examples of choosing which metric unit will be the most suitable form of measurement in different circumstances.

**The length of a pen. **

The best unit of measure here would be to use centimetres.

**The weight of an apple. **

The best unit of measure here would be to use grams.

**The volume of water in a bath. **

The best unit of measure here would be to use litres.

**The weight of a jumbo jet. **

The best unit of measure here would be to use tons.

**The length of a football pitch. **

The best unit of measure here would be to use metres.

**The volume of a can of pop. **

The best unit of measure here would be to use millilitres.

**The length of an ant. **

The best unit of measure here would be to use millimetres.

**The weight of a large sofa. **

The best unit of measure here would be in kilograms.

**The distance from London to Paris. **

The best unit of measure here would be in kilometres.

**The height of a building.**

The best unit of measure here would be in metres.

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