Square metre:
- M^2 redirects here. For other uses, see M².
- CM2 redirects here. For the second game in the Cooking Mama series, see here. For the second game in the Cake Mania series, see here.
A square metre quadrant made of PVC pipe.
The square metre (also spelled square meter, see spelling differences) is the SI derived unit of area, with symbol m²(33A1 in Unicode[1]). It is defined as the area of a square whose sides measure exactly one metre. The square metre is derived from the SI base unit of the metre, which in turn is defined as the length of the path travelled by light in absolute vacuum during a time interval of 1⁄299,792,458 of a second.
Adding SI prefixes creates multiples and submultiples; however, as the unit is squared, the order of magnitude difference between units doubles from their comparable linear units. For example, a kilometre is one thousand times the length of a metre, but a square kilometre is one million times the area of a square metre.
[edit] SI prefixes applied to the square metre
The square metre may be used with all SI prefixes used with the metre.
| Multiple |
Name |
Symbol |
|
Multiple |
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 |
[edit] Conversions
A square metre is equal to:
[edit] See also
[edit] External links
| Orders of magnitude for area |
| 1 E-30 m² = 1 fm² |
1 E-24 m² = 1 pm² |
1 E-18 m² = 1 nm² |
1 E-12 m² = 1 µm² |
1 E-6 m² = 1 mm² |
1 E0 m² = 1 m² |
1 E+6 m² = 1 km² |
1 E+12 m² = 1 Mm² |
1 E+18-24 m² : 1 Gm² |
| 10 fm² |
10 pm² |
10 nm² |
10 µm² |
10 mm² |
10 m² |
10 km² |
10 Mm² |
> 1 E+24 m² : 1 Tm² |
| 100 fm² |
100 pm² |
100 nm² |
100 µm² |
100 mm² = 1 cm² |
100 m² = 1 a |
100 km² |
100 Mm² |
|
| 1,000 fm² |
1,000 pm² |
1,000 nm² |
1,000 µm² |
10 cm² |
10 a |
1,000 km² |
1,000 Mm² |
|
| 10,000 fm² |
10,000 pm² |
10,000 nm² |
10,000 µm² |
100 cm² |
10,000 m² = 1 ha |
10,000 km² |
10,000 Mm² |
|
| 100,000 fm² |
100,000 pm² |
100,000 nm² |
100,000 µm² |
1,000 cm² |
10 ha |
100,000 km² |
100,000 Mm² |
|
| SI derived unit square metre, from base unit metre |
Conversion of units for area |
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