square metre
{{short description|SI-derived unit of area}}
{{Redirect|m^2||m² (disambiguation)}}
{{Infobox unit
| name = Square metre
| image = Mètre carré.png
| caption = Visualization of a square metre
| standard = SI
| quantity = area
| symbol = m2
}}
{{Comparison_area_units.svg}}
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 m2.{{citation | editor=David R. Lide | chapter=INTERNATIONAL SYSTEM OF UNITS | title=CRC Handbook of Chemistry and Physics | edition=90th | year=2010}} 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 103 (one thousand) times the length of 1 metre, but 1 square kilometre is (103)2 (106, one million) times the area of 1 square metre, and 1 cubic kilometre is (103)3 (109, one billion) cubic metres.
SI prefixes applied
File:Square Meter Unit Conversion Visual Aid.svg
The square metre may be used with all SI prefixes used with the metre.
| class="wikitable"
! Multiplication !! Name !! Symbol ! Multiplication !! Name !! Symbol | ||||
| 100
| square metre (centiare) |m2 |100 | square metre (centiare) |m2 | ||||
| 102 | square decametre (are) | dam2
|10−2 | square decimetre | dm2 |
| 103 | kilo square metre | k(m2)
|10−3 | milli square metre | m(m2) |
| 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 |
| 1054
|square ronnametre |Rm2 |10−54 |square rontometre |rm2 | ||||
| 1060
|square quettametre |Qm2 |10−60 |square quectometre |qm2 |
Unicode characters
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.{{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}}
- {{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 Unicode superscript {{unichar|00B2}} can be used, as in m².
Conversions
One square metre is equal to:
{{Div col|colwidth=19em}}
- {{val|0.000001}} square kilometre (km2)
- {{val|10000}} square centimetres (cm2)
- {{val|0.0001}} hectares (ha)
- {{val|0.001}} decares (daa)
- {{val|0.01}} ares (a)
- {{val|0.1}} deciares (da)
- {{val|1}} centiare (ca)
- {{val|0.000247105381}} acres
- {{val|0.0247105381}} cents
- {{val|1.195990}} square yards
- {{val|10.763911}} square feet
- {{val|1550.0031}} square inches
{{Div col end}}
See also
Notes
{{Reflist}}
External links
- [http://www.bipm.fr/en/si/ BIPM (SI maintenance agency)] (home page)
- [http://www.bipm.org/en/si/si_brochure/ BIPM brochure] (SI reference)