An are (symbol a) is a unit of area, equal to 100 square meters (10 m × 10 m), used for measuring land area. It was defined by older forms of the metric system, but is not part of the modern metric system, the International System (SI). It is accepted, but not encouraged, for use with the SI.

It is commonly used in many countries—in particular, in French-, Portuguese, Polish- and German-speaking countries—to measure real estate; elsewhere, the square meter is used. The are is sometimes used in combination with the centiare, e.g. "10 ares 12 centiares" = 1012 m². Larger land areas are generally measured in hectares. The decare (q.v.) is occasionally encountered. Other prefixes for multiples and submultiples of the are are not in common use.

Conversions

One are is equivalent to:

Metric

• 0.0001 km² (square kilometers)
• 0.01 ha (hectares)
• 1 dam² = 10 m × 10 m (a square 10 meters on a side)
• 100 m² (square meters)
• 100 ca (centiares)

English units

• 0.000 038 610 2 square miles (statute)
• 0.024 710 538 international acres
• 0.024 710 439 U.S. survey acres
• 1076.39 square feet

Other

• 0.1 stremma

See also

• 1 E2 m² for a comparison with other areas

External links

• Official SI website: Table 8. Other non-SI units currently accepted for use with the International System Their use is not encouraged.
• Are table

Units of area

Ar | Ар | Ar (enhed) | Ar (Flächenmaß) | Aar | Área (unidad de superficie) | Aro (mezurunuo) | Are | Ara (unità di misura) | Are | アール | Ar | Ar (jednostka miary) | Are | Ар | Ar (enota) | Ár | Ar (jedinica) | Aari (yksikkö) | Ар | 公畝