Ares to Square Meters Converter

The are is one of those metric area units that most people have never heard of — yet it appears in land records, property deeds, and agricultural documents across France, Switzerland, Belgium, and several Central European countries. The calculator for ares to square meters converts instantly between these two units, and extends to related area units like the decare and centiare that appear in the same regional measurement system.

The Are: Definition and Exact Conversion

The are (symbol: a) is defined as exactly 100 square meters:

1 a = 100 m²

1 m² = 0.01 a

The are is the square of the decameter (10 m × 10 m = 100 m²). Its multiples form a coherent system for land measurement:

• 1 centiare (ca) = 1 m² = 0.01 a
• 1 are (a) = 100 m²
• 1 decare (daa) = 10 a = 1,000 m²
• 1 hectare (ha) = 100 a = 10,000 m²

The hectare (100 ares) is the internationally recognized unit for large land areas; the are serves as its subdivision for smaller parcels. Use this online calculator to convert any number of ares to square meters or back. The area conversion calculator handles the full range of area unit conversions including acres and square feet.

Where the Are Is Still Used

While most of the world has moved to hectares for agricultural land measurement, the are persists in specific contexts:

• French cadastral records: French land registry (cadastre) has historically used hectares, ares, and centiares (ha.a.ca) to express parcel areas — e.g., "2 ha 15 a 30 ca" = 21,530 m²
• Swiss and Belgian property records: similar cadastral notation appears in these French-influenced measurement traditions
• Older agricultural documents: crop yield data, lease agreements, and inheritance records from the mid-20th century often cite areas in ares
• Central European countries: parts of Germany, Austria, and the former Habsburg territories used ares in agricultural contexts

The dunams to acres converter and specialized area converters category cover similarly historical or regionally specific area units.

Comparison with Other Agricultural Area Units

The are sits within a family of agricultural area units from different traditions:

• 1 are (100 m²): approximately the footprint of a small studio apartment
• 1 decare (1,000 m²): used in Turkey and the Balkans for agricultural land; roughly 0.247 acres
• 1 dunam (1,000 m²): used in Israel, Turkey, and the Middle East; equals 1 decare
• 1 acre (4,047 m²): approximately 40.47 ares; the British and American standard for farmland
• 1 hectare (10,000 m²): 100 ares; the international standard for large land areas

These units reflect the independent development of land measurement traditions across cultures — each calibrated to the practical scale of agricultural operations in its region of origin.

From Ares to Acres: Cross-System Conversion

For those working with international land records that mix ares and acres: 1 are = 0.02471 acres; 1 acre = 40.469 ares. A French property described as "3 ha 25 a" = 325 ares = 8.03 acres. Conversely, a 100-acre American farm = 4,046.86 ares = 40.47 ha. The hectares to acres converter handles the most common cross-system land area conversion directly.