1 square kilometre = 100 hectares | 1 hectare = 10000 square metres | |

1 square kilometre = 10000 ares | 1 are = 100 square metres | |

1 square kilometre = 1000000 square metres | 1 square metre = 10000 square centimetres | |

1 hectare = 100 ares | 1 square centimetre = 100 square millimetres |