Square metre

Comparison of 1 square metre with some Imperial and metric units of area

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 m2.[1]

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, 1 kilometre is 103 (one thousand) times the length of 1 metre, but 1 square kilometre is (103)2 (106, one million) times the area of 1 square metre, and 1 cubic kilometre is (103)3 (109, 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 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

Unicode characters

Square metre: Unicode characters.[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

Conversions

One square metre is equal to: