Adding and subtracting SI prefixes creates multiples and submultiples; however, as the unit is exponentiated, the quantities grow geometrically by the corresponding power of 10. For example, a kilometre is 103 (a thousand) times the length of a metre, but a square kilometre is (103)2 (106, a million) times the area of a square metre, and a cubic kilometre is (103)3 (109, a billion) cubic metres.
SI prefixes applied
The square metre may be used with all SI prefixes used with the metre.
|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|
|Square metre: Unicode characters.|
|㎡||Square metre (Square M Squared)||U+33A1|
|㎢||Square kilometre (Square KM Squared)||U+33A2|
|㍸||Square decimetre (Square DM Squared)||U+3378|
|㎠||Square centimetre (Square CM Squared)||U+33A0|
|㎟||Square millimetre (Square MM Squared)||U+339F|
A square metre is equal to:
- ^ 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.
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