Square metre: Difference between revisions

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			{{short description\|SI-derived unit of area}}
	A '''square metre''' (] spelling: '''square meter''') is by definition the ] enclosed by a ] with sides each 1 ] long. It is the ] unit of ]. It is abbreviated '''m²'''.
			{{Redirect\|m^2\|\|m² (disambiguation)}}
			{{Infobox unit
			\| name = Square metre
			\| image = Mètre carré.png
			\| caption = Visualization of a square metre
			\| standard = ]
			\| quantity = ]
			\| symbol = m<sup>2</sup>
			}}
			{{Comparison_area_units.svg}}
			The '''square metre''' (] as used by the ]) or '''square meter''' (]) is the unit of ] in the ] (SI) with symbol '''m<sup>2</sup>'''.<ref>{{citation \| editor=David R. Lide \| chapter=INTERNATIONAL SYSTEM OF UNITS \| title=] \| edition=90th \| year=2010}}</ref> It is the area of a ] with sides one ] in length.

			Adding and subtracting ]es creates multiples and submultiples; however, as the unit is ]d, the ] ] by the corresponding ]. For example, 1 ] is 10<sup>3</sup> (one ]) times the length of 1 metre, but 1 square kilometre is (10<sup>3</sup>)<sup>2</sup> (10<sup>6</sup>, one ]) times the area of 1 square metre, and 1 cubic kilometre is (10<sup>3</sup>)<sup>3</sup> (10<sup>9</sup>, one ]) cubic metres.
	A square metre is equal to:
	* 0.000001 square kilometre
	* 10000 square centimetres
	* 0.0001 ]s
	* 0.01 ]s
	* 1.196 ]s
	* 10.76 ]
	* 1550 ]es

			==SI prefixes applied==
	==Square kilometre==

			]
	1 km² is equal to:
	*the area of a ] measuring 1 ] on each side
	*1 000 000 m²
	*100 ]s
	*0.386 102 ]s (statute)
	*247.105 381 ]s

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

			{\|class="wikitable"
	*1 m² = 0.000 001 km²
			! Multiplication !! Name !! Symbol
	*1 hectare = 0.01 km²
	*1 ] = 2.589 988 km²
	*1 acre = 0.004 047 km²

			! Multiplication !! Name !! Symbol
	Note: "km²" means square kilometre and not kilo–square metre. For example, 3 km² is equal to 3 000 000 m² and not to 3000 m².
			\|-
			\|10<sup>0</sup>
			\| '''square metre''' (])
			\|'''m<sup>2</sup>'''
			\|10<sup>0</sup>
			\| '''square metre''' (])
			\|'''m<sup>2</sup>'''
			\|-
			\|10<sup>2</sup>\|\| square decametre (]) \|\| dam<sup>2</sup>
			\|10<sup>−2</sup>\|\| square decimetre \|\| dm<sup>2</sup>
			\|-
			\|10<sup>4</sup>\|\| square hectometre (])\|\| hm<sup>2</sup>
			\|10<sup>−4</sup>\|\| square centimetre\|\| cm<sup>2</sup>
			\|-
			\|10<sup>6</sup>\|\| ]\|\| km<sup>2</sup>
			\|10<sup>−6</sup>\|\| square millimetre\|\| mm<sup>2</sup>
			\|-
			\|10<sup>12</sup>\|\| square megametre\|\| Mm<sup>2</sup>
			\|10<sup>−12</sup>\|\| square micrometre\|\| μm<sup>2</sup>
			\|-
			\|10<sup>18</sup>\|\| square gigametre\|\| Gm<sup>2</sup>
			\|10<sup>−18</sup>\|\| square nanometre\|\| nm<sup>2</sup>
			\|-
			\|10<sup>24</sup>\|\| square terametre \|\| Tm<sup>2</sup>
			\|10<sup>−24</sup>\|\| square picometre\|\| pm<sup>2</sup>
			\|-
			\|10<sup>30</sup>\|\| square petametre\|\| Pm<sup>2</sup>
			\|10<sup>−30</sup>\|\| square femtometre\|\| fm<sup>2</sup>
			\|-
			\|10<sup>36</sup>\|\| square exametre\|\| Em<sup>2</sup>
			\|10<sup>−36</sup>\|\| square attometre\|\| am<sup>2</sup>
			\|-
			\|10<sup>42</sup>\|\| square zettametre\|\| Zm<sup>2</sup>
			\|10<sup>−42</sup>\|\| square zeptometre\|\| zm<sup>2</sup>
			\|-
			\|10<sup>48</sup>\|\| square yottametre\|\| Ym<sup>2</sup>
			\|10<sup>−48</sup>\|\| square yoctometre\|\| ym<sup>2</sup>
			\|-
			\|10<sup>54</sup>
			\|square ronnametre
			\|Rm<sup>2</sup>
			\|10<sup>−54</sup>
			\|square rontometre
			\|rm<sup>2</sup>
			\|-
			\|10<sup>60</sup>
			\|square quettametre
			\|Qm<sup>2</sup>
			\|10<sup>−60</sup>
			\|square quectometre
			\|qm<sup>2</sup>
			\|}

			== Unicode characters ==
	==Square megametre==

			Unicode has several characters used to represent metric area units, but these are for compatibility with East Asian character encodings and are {{em\|not}} meant to be used in new documents.<ref name="Unicode-U3300">{{cite web \|url=https://www.unicode.org/charts/PDF/U3300.pdf \|access-date=May 24, 2019 \|title=The Unicode Standard 12.0 – CJK Compatibility ❰ Range: 3300—33FF ❱ \|author=Unicode Consortium \|author-link=Unicode Consortium \|date=2019 \|website=Unicode.org}}</ref>
	Square megametres are not widely used; however, there are a number of "megametre fans" who think that this unit is very convenient for measuring ]s and ]s.
			* {{unichar\|33A1\|Square M Squared}}
			* {{unichar\|33A2\|Square KM Squared}}
			* {{unichar\|3378\|Square DM Squared}}
			* {{unichar\|33A0\|Square CM Squared}}
			* {{unichar\|339F\|Square MM Squared}}
			Instead, the ] {{unichar\|00B2}} can be used, as in m².

			==Conversions==
	1 Mm² is equal to:

	* the area of a ] measuring 1 ] on each side
			One square metre is equal to:
	* 1 000 000 000 000 m²
			{{Div col\|colwidth=19em}}
	* 100 000 000 ]s
			* {{val\|0.000001}} ] (km<sup>2</sup>)
	* 1 000 000 km²
			* {{val\|10000}} square centimetres (cm<sup>2</sup>)
	* 1 Mm² is the area of ]
			* {{val\|0.0001}} ]s (ha)
	* The area of ] is 30.2 Mm²
			* {{val\|0.001}} decares (daa)
	* The total area of the ]'s surface is 38 Mm²
			* {{val\|0.01}} ]s (a)
	* The total area of dry land on ] is 149.8 Mm²
			* {{val\|0.1}} deciares (da)
	* The area of the ] is 179.7 Mm²
			* {{val\|1}} ] (ca)
	* The total area of the ]'s surface is 510 Mm²
			* {{val\|0.000247105381}} ]s
			* {{val\|0.0247105381}} ]s
			* {{val\|1.195990}} ]s
			* {{val\|10.763911}} ]
			* {{val\|1550.0031}} ]es
			{{Div col end}}

	==See also==		==See also==
			*]
			*]
	*]		*]
	*]		*]

	*]
			== Notes ==
	*]
			{{Reflist}}
	*]

	*]
			== External links ==
			* (home page)
			* (SI reference)

	]		]
	]		]

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Latest revision as of 14:27, 24 December 2024

SI-derived unit of area "m^2" redirects here. For other uses, see m² (disambiguation).

Square metre
Visualization of a square metre
General information
Unit system	SI
Unit of	area
Symbol	m

The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m. It is the area of a square with sides one metre in length.

Adding and subtracting SI prefixes creates multiples and submultiples; however, as the unit is exponentiated, the quantities grow exponentially by the corresponding power of 10. For example, 1 kilometre is 10 (one thousand) times the length of 1 metre, but 1 square kilometre is (10) (10, one million) times the area of 1 square metre, and 1 cubic kilometre is (10) (10, one billion) cubic metres.

SI prefixes applied

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

Multiplication	Name	Symbol	Multiplication	Name	Symbol
10	square metre (centiare)	m	10	square metre (centiare)	m
10	square decametre (are)	dam	10	square decimetre	dm
10	square hectometre (hectare)	hm	10	square centimetre	cm
10	square kilometre	km	10	square millimetre	mm
10	square megametre	Mm	10	square micrometre	μm
10	square gigametre	Gm	10	square nanometre	nm
10	square terametre	Tm	10	square picometre	pm
10	square petametre	Pm	10	square femtometre	fm
10	square exametre	Em	10	square attometre	am
10	square zettametre	Zm	10	square zeptometre	zm
10	square yottametre	Ym	10	square yoctometre	ym
10	square ronnametre	Rm	10	square rontometre	rm
10	square quettametre	Qm	10	square quectometre	qm

Unicode characters

Unicode has several characters used to represent metric area units, but these are for compatibility with East Asian character encodings and are not meant to be used in new documents.

U+33A1 ㎡ SQUARE M SQUARED
U+33A2 ㎢ SQUARE KM SQUARED
U+3378 ㍸ SQUARE DM SQUARED
U+33A0 ㎠ SQUARE CM SQUARED
U+339F ㎟ SQUARE MM SQUARED

Instead, the Unicode superscript U+00B2 ² SUPERSCRIPT TWO can be used, as in m².

Conversions

One square metre is equal to:

0.000001 square kilometre (km)
10000 square centimetres (cm)
0.0001 hectares (ha)
0.001 decares (daa)
0.01 ares (a)
0.1 deciares (da)
1 centiare (ca)
0.000247105381 acres
0.0247105381 cents
1.195990 square yards
10.763911 square feet
1550.0031 square inches

Notes

David R. Lide, ed. (2010), "INTERNATIONAL SYSTEM OF UNITS", CRC Handbook of Chemistry and Physics (90th ed.)
Unicode Consortium (2019). "The Unicode Standard 12.0 – CJK Compatibility ❰ Range: 3300—33FF ❱" (PDF). Unicode.org. Retrieved May 24, 2019.

External links

BIPM (SI maintenance agency) (home page)
BIPM brochure (SI reference)

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