Square metre: Difference between revisions
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| ⚫ | The '''square metre''' ([[American and British English spelling differences#-re, -er|international spelling]] as used by the [[International Bureau of Weights and Measures]]) or '''square meter''' ([[American and British English spelling differences#-re, -er|American spelling]]) is the unit of [[area]] in the [[International System of Units]] (SI) with symbol '''m<sup>2</sup>'''.<ref>{{citation | editor=David R. Lide | chapter=INTERNATIONAL SYSTEM OF UNITS | title=[[CRC Handbook of Chemistry and Physics]] | edition=90th | year=2010}}</ref> It is the area of a [[square]] with sides one [[metre]] in length. |
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Adding and subtracting [[SI prefix]]es creates multiples and submultiples; however, as the unit is [[exponentiate]]d, the [[quantities]] [[exponential growth|grow exponentially]] by the corresponding [[power of 10]]. For example, 1 [[kilometre]] is 10<sup>3</sup> (one [[thousand]]) times the length of 1 metre, but 1 square kilometre is (10<sup>3</sup>)<sup>2</sup> (10<sup>6</sup>, one [[million]]) times the area of 1 square metre, and 1 cubic kilometre is (10<sup>3</sup>)<sup>3</sup> (10<sup>9</sup>, one [[billion]]) cubic metres. |
Adding and subtracting [[SI prefix]]es creates multiples and submultiples; however, as the unit is [[exponentiate]]d, the [[quantities]] [[exponential growth|grow exponentially]] by the corresponding [[power of 10]]. For example, 1 [[kilometre]] is 10<sup>3</sup> (one [[thousand]]) times the length of 1 metre, but 1 square kilometre is (10<sup>3</sup>)<sup>2</sup> (10<sup>6</sup>, one [[million]]) times the area of 1 square metre, and 1 cubic kilometre is (10<sup>3</sup>)<sup>3</sup> (10<sup>9</sup>, one [[billion]]) cubic metres. |
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== Examples == |
== Examples == |
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* One square |
* One square meter can stand up to 5 people at the same time.<ref>{{Cite web |title=Standing Crowd Density {{!}} Prof. Dr. G. Keith Still |url=https://www.gkstill.com/Support/crowd-density/CrowdDensity-1.html |access-date=2022-12-01 |website=www.gkstill.com}}</ref> |
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==See also== |
==See also== |
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Revision as of 18:11, 1 December 2022
| Square metre | |
|---|---|
| Unit system | SI |
| Unit of | area |
| Symbol | m2 |
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.[1] 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
The square metre may be used with all SI prefixes used with the metre.
| 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 |
| 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 |
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.[2]
- 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 (km2)
- 10000 square centimetres (cm2)
- 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
Examples
- One square meter can stand up to 5 people at the same time.[3]
See also
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.
- ^ "Standing Crowd Density | Prof. Dr. G. Keith Still". www.gkstill.com. Retrieved 2022-12-01.
External links
- BIPM (SI maintenance agency) (home page)
- BIPM brochure (SI reference)