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The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the SI-derived unit of area with symbol m.
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 10 (a thousand) times the length of a metre, but a square kilometre is 10 (10, a million) times the area of a square metre, and a cubic kilometre is 10 (10, a 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 | µm | |
| 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 |
Unicode characters
| Square metre: Unicode characters. | ||
|---|---|---|
| Symbol | Name | Unicode number |
| ㎡ | 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 |
Conversions
A 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
- 0.024710538 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)