Square foot
The square foot ( square foot, plural square feet) is a unit of area in the Imperial measurement system, which is used in the United States and the United Kingdom. As a historical dimension he was in continental Europe until the introduction of the metric system in use.
A square is defined as a square area with a side length of 1 foot ( 0.333 equivalent yard, 12 inches ( inches ) or 0.3048 m). This corresponds to approximately 0.09 square meters.
Abbreviations
There is no generally accepted abbreviation for the unit. The following variants are in use:
- Square feet, square foot, square ft
- Sq. feet, sq. foot, sq. ft, SF
Rare also:
- Feet/-2, foot/-2, ft/-2
- Feet ^ 2 foot ^ 2 ft ^ 2
- Feet ², foot ², ft ²
In architectural drawings and in the Real Estate also a square is used as a symbol, which is divided by a diagonal or vertical line.
Conversion
1 square foot corresponds to the Anglo-American system of measurement:
In the metric or SI system:
- 92903.04 square millimeter
- 929.0304 square centimeters
- 0.09290304 square meters
Historical Dimension in continental Europe
Before the introduction of the metric system in the course of the 19th century the square was ( Abbr: Qu.-F. or ◻ ') and in continental Europe a common area measure. He differed, depending on the different foot - normalizations, from country to country.
So, for example, was:
In Bavaria, but occasionally also in other German regions, the ten - and twelve-part sq distinction was made in the square. The former had 100, the latter 144 square inches.