# Metric and Imperial

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## Metric and Imperial

#### Basic facts

Although we have been using the metric system for ages a lot of people in Britain (but very few on the continent) still work in Imperial units. For instance, there's a good chance that you know your weight in stones and your height in feet and not kilograms and metres!

Due to this you still need to know both systems and be able to convert(approximately) between them.

#### Metric

Here are some basic facts that you should know:

 Length 1cm = 10mm 1m = 100cm 1km = 1000m

 Mass: 1kg = 1000g 1 tonne = 1000kg

 Volume: 1 litre = 1000ml = 1000cm3

 Note to remember: 1m = 100cm 1m2 = 10 000cm2 1m3 = 1 000 000cm3

#### Imperial

Here are some more facts that you should know:

 Length: 1 foot = 12 inches 1 yard = 3 feet 1 mile = 1760 yards

 Length: 1 pound = 16 ounces 1 stone = 14 pounds 1 ton = 160 stones (or 2240 pounds)

Note: the different spellings of tonne (metric) and ton (imperial).

 Volume: 1 gallon = 8 pints

#### Conversion

You need to know the approximate conversions between some of the metric and imperial units. Here are the main ones:

#### Kilometres and Miles:

Miles to km - Multiply by 1.6

km to Miles - Multiply by 0.62

#### Kilograms and Pounds:

kg to Pounds - Multiply by 2.2

Pounds to kg - Multiply by 0.45

#### Litres and Gallons:

Litres to Gallons - Multiply by 0.22

Gallons to Litres - Multiply by 4.55

#### Metres, centimetres, feet and inches:

Inch to cm - Multiply by 2.54

cm to Inch - Multiply by 0.39