:''M^2 redirects here. For other uses, see M².''



The square metre (also spelled meter, see spelling differences) is the SI derived unit of area, with symbol m². It is defined as the area of a square whose sides measure exactly one metre. The square metre is derived from the SI base unit of the metre, which in turn is defined as the length of the path travelled by light in absolute vacuum during a time interval of of a second.

Adding SI prefixes creates multiples and submultiples; however, as the unit is squared, the order of magnitude difference between units doubles from their comparable linear units. For example, a kilometre is one thousand times the length of a metre, but a square kilometre is one million times the area of a square metre.

SI prefixes applied to the square metre
The square metre may be used with all SI prefixes used with the metre.


! Multiple !! Name !! Symbol
|rowspan="12"|
! Multiple !! Name !! Symbol
|-
|100
| square metre (centiare)
|m²
|100
| square metre (centiare)
|m²
|-
|102|| square decametre (are) || dam²
|10–2|| square decimetre || dm²
|-
|104|| square hectometre (hectare)|| hm²
|10–4|| square centimetre|| cm²
|-
|106|| square kilometre|| km²
|10–6|| square millimetre|| mm²
|-
|1012|| square megametre|| Mm²
|10–12|| square micrometre|| µm²
|-
|1018|| square gigametre|| Gm²
|10–18|| square nanometre|| nm²
|-
|1024|| square terametre || Tm²
|10–24|| square picometre|| pm²
|-
|1030|| square petametre|| Pm²
|10–30|| square femtometre|| fm²
|-
|1036|| square exametre|| Em²
|10–36|| square attometre|| am²
|-
|1042|| square zettametre|| Zm²
|10–42|| square zeptometre|| zm²
|-
|1048|| square yottametre|| Ym²
|10–48|| square yoctometre|| ym²
|-
|-


Conversions

A square metre is equal to:

  • 0.000 001 square kilometre (km²)

  • 10,000 square centimetres (cm²)

  • 0.000 1 hectares (ha)

  • 0.01 ares (a)

  • 1 centiare (ca)

  • 0.000 247 105 381 acres

  • 1.195 990 square yards

  • 10.763 911 square feet

  • 1,550.003 1 square inches



    • See also

    |-valign=top
    |
  • SI

  • SI prefix

  • 1 E0 m²

    • | width=40 |
    |
  • Conversion of units

  • Orders of magnitude



    • External links
  • BIPM (SI maintenance agency) (home page)

  • BIPM brochure (SI reference)


    • Category:Units of area
    Category:SI derived units

    ast:Metru cuadráu
    bn:বর্গমিটার
    bg:Квадратен метър
    zh-min-nan:Pêng-hong-kong-chhioh
    ca:Metre quadrat
    cs:Metr čtvereční
    da:Kvadratmeter
    de:Quadratmeter
    el:Τετραγωνικό μέτρο
    es:Metro cuadrado
    eo:Kvadrata metro
    eu:Metro koadro
    fr:Mètre carré
    ko:제곱미터
    is:Fermetri
    it:Metro quadro
    he:מטר מרובע
    sw:Mita ya mraba
    la:Metrum quadratum
    li:Veerkante maeter
    lt:Kvadratinis metras
    hu:Négyzetméter
    nl:Vierkante meter
    ja:平方メートル
    no:Kvadratmeter
    nn:Kvadratmeter
    pl:Metr kwadratowy
    pt:Metro quadrado
    th:ตารางเมตร
    ru:Квадратный метр
    sk:Štvorcový meter
    sl:Kvadratni meter
    fi:Neliömetri
    sv:Kvadratmeter
    vi:Mét vuông
    zh:平方米