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:''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.

Contents

SI prefixes applied to the square metre

Conversions

See also

External links

SI prefixes applied to the square metre

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

Multiple	Name	Symbol		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

★ SI ★ SI prefix ★ 1 E0 m²

★ Conversion of units ★ Orders of magnitude

External links

★ BIPM (SI maintenance agency) (home page)

★ BIPM brochure (SI reference)