Square metre

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M^2 redirects here. For other uses, see M².
A square metre quadrat made of PVC pipe.
A square metre quadrat made of PVC pipe.

The square metre (also spelled meter, see spelling differences) is the SI derived unit of area, with symbol m². 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.

Contents

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

A square metre is equal to:

SI derived unit square metre, from base unit metre Orders of magnitude for area Conversion of units 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 m² = 1 Gm² 1 E+24 m² = 1 Tm² 1 E+30 m² = 1 Pm²
10 fm² 10 pm² 10 nm² 10 µm² 10 mm² 10 m² 10 km² 10 Mm² 10 Gm² 10 Tm² 1 E+36 m² = 1 Em²
100 fm² 100 pm² 100 nm² 100 µm² 100 mm² = 1 cm² 100 m² = 1 dam² aka a 100 km² 100 Mm² 100 Gm² 100 Tm² 1 E+40 m²
1,000 fm² 1,000 pm² 1,000 nm² 1,000 µm² 1,000 mm² = 10 cm² 1,000 m² = 10 dam² aka a 1,000 km² 1,000 Mm² 1,000 Gm² 1,000 Tm² 1 E+41 m²
10,000 fm² 10,000 pm² 10,000 nm² 10,000 µm² 10,000 mm² = 1 dm² 10,000 m² = 1 hm² aka ha 10,000 km² 10,000 Mm² 10,000 Gm² 10,000 Tm² 1 E+42 m² = 1 Zm²
100,000 fm² 100,000 pm² 100,000 nm² 100,000 µm² 100,000 mm² = 10 dm² 100,000 m² = 10 hm² aka ha 100,000 km² 100,000 Mm² 100,000 Gm² 100,000 Tm² 1 E+48 m² = 1 Ym²
Retrieved from "http://en.wikipedia.org/wiki/Square_metre"
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