Square metre: Difference between revisions
ChesterChow (talk | contribs) use actual unicode character #article-section-source-editor Tags: Mobile edit Mobile app edit iOS app edit |
|||
(16 intermediate revisions by 12 users not shown) | |||
Line 3: | Line 3: | ||
{{Infobox unit |
{{Infobox unit |
||
| name = Square metre |
| name = Square metre |
||
| image = |
| image = Mètre carré.png |
||
| caption = |
| caption = Visualization of a square metre |
||
| standard = [[International System of Units|SI]] |
| standard = [[International System of Units|SI]] |
||
| quantity = [[area]] |
| quantity = [[area]] |
||
Line 10: | Line 10: | ||
}} |
}} |
||
{{Comparison_area_units.svg}} |
{{Comparison_area_units.svg}} |
||
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 |
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. |
||
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. |
||
==SI prefixes applied== |
==SI prefixes applied== |
||
[[File:Square Meter Unit Conversion Visual Aid.svg|thumb|Square Meter Unit Conversion Visual Aid]] |
|||
The square metre may be used with all SI prefixes used with the metre. |
The square metre may be used with all SI prefixes used with the metre. |
||
Line 59: | Line 62: | ||
|10<sup>−48</sup>|| square yoctometre|| 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 == |
== 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.<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> |
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> |
||
* {{unichar|33A1|Square M Squared |
* {{unichar|33A1|Square M Squared}} |
||
* {{unichar|33A2|Square KM Squared}} |
* {{unichar|33A2|Square KM Squared}} |
||
* {{unichar|3378|Square DM Squared}} |
* {{unichar|3378|Square DM Squared}} |
||
* {{unichar|33A0|Square CM Squared}} |
* {{unichar|33A0|Square CM Squared}} |
||
* {{unichar|339F|Square MM Squared}} |
* {{unichar|339F|Square MM Squared}} |
||
Instead, the [[Unicode subscripts and superscripts|Unicode superscript]] {{unichar|00B2}} can be used, as in m². |
|||
==Conversions== |
==Conversions== |
Latest revision as of 05:06, 2 April 2024
Square metre | |
---|---|
![]() Visualization of a square metre | |
General information | |
Unit system | SI |
Unit of | area |
Symbol | m2 |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Comparison_land_area_units.svg/298px-Comparison_land_area_units.svg.png)
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
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Square_Meter_Unit_Conversion_Visual_Aid.svg/220px-Square_Meter_Unit_Conversion_Visual_Aid.svg.png)
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 |
1054 | square ronnametre | Rm2 | 10−54 | square rontometre | rm2 |
1060 | square quettametre | Qm2 | 10−60 | square quectometre | qm2 |
Unicode characters
[edit]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
[edit]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
See also
[edit]Notes
[edit]- ^ 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
[edit]- BIPM (SI maintenance agency) (home page)
- BIPM brochure (SI reference)