| 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)/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 | ÎĽm |
| 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
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.
External links※
- BIPM (SI maintenance agency) (home page)
- BIPM brochure (SI reference)