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^{2}.^{[1]}
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^{3} (one thousand) times the length of 1 metre, but 1 square kilometre is (10^{3})^{2} (10^{6}, one million) times the area of 1 square metre, and 1 cubic kilometre is (10^{3})^{3} (10^{9}, one billion) cubic metres.
The square metre may be used with all SI prefixes used with the metre.
Multiplication | Name | Symbol | Multiplication | Name | Symbol | |
---|---|---|---|---|---|---|
10^{0} | square metre (centiare) | m^{2} | 10^{0} | square metre (centiare) | m^{2} | |
10^{2} | square decametre (are) | dam^{2} | 10^{−2} | square decimetre | dm^{2} | |
10^{4} | square hectometre (hectare) | hm^{2} | 10^{−4} | square centimetre | cm^{2} | |
10^{6} | square kilometre | km^{2} | 10^{−6} | square millimetre | mm^{2} | |
10^{12} | square megametre | Mm^{2} | 10^{−12} | square micrometre | µm^{2} | |
10^{18} | square gigametre | Gm^{2} | 10^{−18} | square nanometre | nm^{2} | |
10^{24} | square terametre | Tm^{2} | 10^{−24} | square picometre | pm^{2} | |
10^{30} | square petametre | Pm^{2} | 10^{−30} | square femtometre | fm^{2} | |
10^{36} | square exametre | Em^{2} | 10^{−36} | square attometre | am^{2} | |
10^{42} | square zettametre | Zm^{2} | 10^{−42} | square zeptometre | zm^{2} | |
10^{48} | square yottametre | Ym^{2} | 10^{−48} | square yoctometre | ym^{2} |
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 |
One square metre is equal to:
Categories: Units of area | SI derived units