Unit 17 Section 2 : Conversion between metric units
In this section we will learn how to convert between metric units of length, mass and capacity.
The units we will be working with are:
Length  kilometre (km), metre (m), centimetre (cm), millimetre (mm) 
Mass  tonne (t), kilogram (kg), gram (g) 
Capacity  litre (l), millilitre (ml) 
You might have noticed that some of the units have the same prefixes, like kilo, milli and centi.
kilo means thousand, as in "one kilometre is a thousand metres" 
milli means thousandth, as in "one millimetre is a thousandth of a metre" 
centi means hundredth, as in "one centimetre is a hundredth of a metre" 
For any two metric units, you convert from the larger unit to the smaller by multiplying by one of 10, 100, 1000 etc.
The reverse is also true; you can convert from a smaller unit to a larger by dividing by one of 10, 100, 1000 etc.
Have a look at the examples below to see how this works:
It is also useful to know that 1 cm^{3} = 1 millilitre (ml).
Practice Questions
Work out the answer to each of these questions then click on the button marked
to see whether you are correct.
Practice Question 1
(a) Convert 150 cm into metres.
(b) Convert 360 mm into metres.
(c) Convert 3.6 tonnes into kilograms.
(d) Convert 62 ml into litres
(e) Convert 2100 cm^{3} into litres
Practice Question 2
John adds 250 ml of water to a jug that already contains 1.2 litres of water.
How much water is now in the jug?
Exercises
Work out the answers to the questions below and fill in the boxes. Click on the
button to find out whether you have answered correctly. If you are right
then will appear and you should move on to the next
question. If appears then your answer is wrong. Click
on to clear your original answer and have another go.
If you can't work out the right answer then click on
to see
the answer.
You have now completed Unit 17 Section 2
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Produced by A.J. Reynolds August 2008
