# Units of Area

The fundamental unit for measuring area is the square meter, which is the area of a square whose sides measure 1 meter.

There are also other units for measuring large and small quantities of area:

square kilometer | km^{2} |
1,000,000 m^{2} |

square hectometer | hm^{2} |
10,000 m^{2} |

square decameter | dam^{2} |
100 m^{2} |

square meter | m^{2} |
1 m^{2} |

square decimeter | dm^{2} |
0.01 m^{2} |

square centimeter | cm^{2} |
0.0001 m^{2} |

square milimeter | mm^{2} |
0.000001 m^{2} |

Note that each unit is 100 times larger than the previous.

Therefore, the problem of converting units to other units becomes an issue of multiplying or dividing the unit by one followed by as many pairs of zeros as there are places between them.

1.5 hm^{2} m^{2}

In this case, multiply (because the hm^{2} is greater than the m^{2}) the unit by one followed by four zeros, since there are two places between both units.

1.5 · 10,000 = 15,000 m^{2}

15,000 mm^{2} m^{2}

In this case, divide (because the mm^{2} is smaller than the m^{2}) by one followed by six zeros, since there are three places between both units.

15.000 : 1,000,000 = 0.015 m^{2}

#### Examples

### Land Area Measurements

#### Hectare

The hectare is equivalent to the square hectometer.

**1 ha = 1 hm ^{2} = 10,000 m²**

#### Are

The are is equivalent to the square decameter.

**1 a = 1 dam ^{2} = 100 m²**

#### Centiare

The centiare is equivalent to the square meter.

**1 ca = 1 m²**

Convert to hectares:

211,943 a

211,943 : 100 = 2,119.43 ha

356,500 m^{2}

356,500 : 10,000 = 35.65 hm^{2} = 35.65 ha

0.425 km^{2 }

0.425 ** · **100 = 42.5 hm^{2} = 42.5 ha

8 km^{2} 31 hm^{2} 50 dam^{2}

8 ** · **100 + 31 + 50 : 100 = 731.5 hm^{2 }= 831.5 ha

91 m^{2} 33 dm^{2} 10 cm^{2} =

91 : 10,000 + 33 : 1,000,000 + 10 : 100,000,000=

0.00913310 hm^{2} = 0.00913310 ha