Area units calculator & converter tool
Acre Conversions Table
Equivalent of 4 Acre: |
16187.450678861 m2 (Square meter) |
161874506.78861 cm2 (Square centimeter) |
1618745.0678861 dm2 (Square decimeter) |
16187450678.861 mm2 (Square milimeter) |
0.016187450678861 km2 (Square Kilometer) |
1.6187450678861 Hectare |
161.87450678861 Are |
16.187450678861 Decare |
16187.450678861 Centiare |
4.7349102608203 Arpent |
16187450.678861 Barn |
174240.10036219 Square feet |
640.00161874507 Square perche |
0.0062499747071083 Square mil |
19360.029137411 Square yard |
25090623.461221 Square inch |
0.00017369134578418 Canton |
0.024993423848162 Homestead |
15.999676250986 Rood |
Acre / Hectare Units Definition
Acre
The acre (/ˈeɪkər/ AY-kər) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, 1⁄640 of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. Based upon the international yard and pound agreement of 1959, an acre may be declared as exactly 4,046.8564224 square metres. The acre is sometimes abbreviated ac but is usually spelled out as the word "acre".
Hectare
hectare, unit of area in the metric system equal to 100 ares, or 10,000 square meters, and the equivalent of 2.471 acres in the British imperial system and the customary measurement of the United States. The term is derived from the Latin area and hect, an irregular contraction of the Greek word percent. Although the are is the primary metric unit of land measurement, the hectare is more commonly used in practice. The hectare is, by definition, equal to one djerib in Turkey, one jerib in Iran, one gong qing in mainland China, one manzana in Argentina and one bunder in the Netherlands.