Definition of Acre Acre: A Fundamental Unit of Measurement

The acre is a unit of area measurement commonly abbreviated as "ac". It is used to measure land area and is particularly relevant in real estate, agriculture, land development, and urban planning. One acre is defined as the area of land that is one chain (66 feet) by one furlong (660 feet), totaling 43,560 square feet.

Square Meters (m²): 1 acre is equal to approximately 4046.86 square meters. This conversion is useful for international measurements or when dealing with metric units. For example, a plot of land measuring 1 acre is approximately 4046.86 square meters in size.

Hectares (ha): 1 acre is equivalent to 0.404686 hectares. Hectares are commonly used in agriculture and forestry. For instance, a farm with an area of 100 acres is approximately 40.47 hectares in size.

Square Feet (ft²): 1 acre equals 43,560 square feet. This conversion is often used in the United States for measuring large areas of land, such as farms or estates. For example, a land parcel advertised as 5 acres would have an area of 217,800 square feet.

Square Yards (yd²): 1 acre is equivalent to 4840 square yards. Square yards are commonly used for smaller land areas or in landscaping projects.

Square Kilometers (km²): 1 acre is approximately 0.00404686 square kilometers. This conversion is useful for larger land areas, such as national parks or territories. For example, a nature reserve covering 1,000 acres would be approximately 4.04686 square kilometers in size.

The acre plays a crucial role in land measurement, providing a standardized unit for assessing and valuing land parcels.

Definition   US/UK customary area equal to 43,560 square feet (1 chain × 1 furlong).   Exact factor   1 ac = 4,046.8564224 m² (exact);  1 ac = 43,560 ft² (exact)   Common equivalents  

1 ac = 4,840 yd² (exact)

1 ac = 0.40468564224 ha