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 / Perche2 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".
Square perche
A square perch (often shortened to just a perch) is a unit of measurement and is equal to 25.29285264 square metres. Confusingly, a perch (not the squared
variety) is also called a rod or pole because it’s based on a surveyor’s tool
measuring exactly 5½ yards or 16½ feet or ¼ of a surveyor’s chain. The perch or rod was helpful tool and measurement for a surveyor because it could be used to create a ‘perfect’ acre of 40 perches by 4 perches – remember 160 perches equals an acre.