Area units calculator & converter tool
Acre Conversions Table
Equivalent of 7 Acre: |
28328.038688007 m2 (Square meter) |
283280386.88007 cm2 (Square centimeter) |
2832803.8688007 dm2 (Square decimeter) |
28328038688.007 mm2 (Square milimeter) |
0.028328038688007 km2 (Square Kilometer) |
2.8328038688007 Hectare |
283.28038688007 Are |
28.328038688007 Decare |
28328.038688007 Centiare |
8.2860929564355 Arpent |
28328038.688007 Barn |
304920.17563384 Square feet |
1120.0028328039 Square perche |
0.01093745573744 Square mil |
33880.05099047 Square yard |
43908591.057137 Square inch |
0.00030395985512232 Canton |
0.043738491734283 Homestead |
27.999433439226 Rood |
Acre / Barn 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".
Barn
A barn (symbol: b) is a metric unit of area equal to 10-28 m2 (100 fm2). Originally used in nuclear physics to express the cross section of nuclei and nuclear reactions, it is also used today in all areas of high energy physics to express the cross sections of any diffusion process, and is best understood as a measure of the probability of interaction between small particles. A barn corresponds approximately to the cross section of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. Although the barn was never an SI unit, the SI standards body recognized it in the 8th SI brochure (replaced 2019) due to its use in particle physics.