# Metric and Imperial

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## Metric and Imperial

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.

**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 = 1000cm^{3} |

Note to remember: |

1m = 100cm |

1m^{2} = 10 000cm^{2}^{ } |

1m^{3} = 1 000 000cm^{3} |

**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 |

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

**Miles to km - Multiply by 1.6 **

**km to Miles - Multiply by 0.62 **

**kg to Pounds - Multiply by 2.2**

**Pounds to kg - Multiply by 0.45 **

**Litres to Gallons - Multiply by 0.22**

**Gallons to Litres - Multiply by 4.55**

**Inch to cm - Multiply by 2.54 **

**cm to Inch - Multiply by 0.39 **