Square metre

Square meter is a unit of area, namely the coherent SI unit of area. One square meter is the area of ​​a square of side length 1 meter.

The unit symbol for square meter m2. In the widely read abbreviation sqm is an outdated, no longer permissible in the currently valid SI unit system unit characters.

Colloquially the square meter and square or square meter (obsolete) is called.

Conversions

Barn, Ar and acres are approved in Germany, Austria and Switzerland legal units of measurement with limited scope. The Barn may may only be used in nuclear and atomic physics, Ar and acres only in the square footage for primary and parcels.

To specify residential special rules apply (percentage discounts for additional rooms or under the eaves, etc. ) so that a legally correct statement of the measured surface area may vary.

Common variations of the unit square

By setting an appropriate SI prefix between square - and - meter, you can also define other measures of surfaces. The intent is there, according to the International System of Units (SI ) is set directly in front of the base unit.

Square millimeter

The square millimeter ( unit symbol: mm2) is an SI unit of area. A square millimeter or " millimeter squared " is the area of a square with 1 mm = 0.1 cm on a side. It is 100 mm2 = 1 cm2.

Square centimeter

The square centimeter ( unit symbol: cm2 ) is an SI unit of the surface. A square centimeter or " centimeter squared " is the area of ​​a square having 1 cm = 10 mm side length. With the proliferation of computers, the problem occurred that the superscript " 2 " initially could not be shown, so were and Behelfsschreibungen " cm2 ", " cm ^ 2" and " cm ** 2 " are sometimes still used. It is 100 cm2 = 1 dm2.

Square decimeter

The square decimeter ( unit symbol: dm2 ) is a unit of area. A square decimeter or " decimeter squared " is the area of ​​a square with side length of 1 decimeter. Even the descriptions of " dm ", " dm ^ 2" and " dm ** 2 " are used, but are not permitted. The following applies: 10,000 cm2 = 100 dm2 = 1 m2.

Square kilometers

A square kilometers is the area of ​​a square of 1 km side length. A square kilometers covers 100 hectares. The symbols of square kilometers km2. The following applies: 1,000,000 m2 = 1 km2.

The abbreviation square kilometers still often does not meet the International System of Units, the standards set out in the recommendations of the German Institute for Standardization ( DIN) and the German legislation on legal units of measurement.