Area units calculator & converter tool
Are Conversions Table
Equivalent of 3 Are: |
| 300 m2 (Square meter) |
| 3000000 cm2 (Square centimeter) |
| 30000 dm2 (Square decimeter) |
| 300000000 mm2 (Square milimeter) |
| 0.0003 km2 (Square Kilometer) |
| 0.03 Hectare |
| 0.3 Decare |
| 300 Centiare |
| 0.0877515 Arpent |
| 300000 Barn |
| 3229.17 Square feet |
| 0.0741315 Acre |
| 11.86107 Square perche |
| 0.00011583 Square mil |
| 358.797 Square yard |
| 465001.38827888 Square inch |
| 3.219E-6 Canton |
| 0.0004632 Homestead |
| 0.29652 Rood |
Are / Barn Units Definition
Are
Are, unit of area in the metric system, equal to 100 square meters and the equivalent of 0.0247 acre. Its multiple, the hectare (equal to 100 ares), is the primary unit of land measurement for most of the world. The are was the basic unit of area when the metric system was first decreed in France in 1795. When the International System of Units (SI) was adopted in 1960, the square meter replaced the are as the unit of area, but the International Bureau of Weights and Measures accepted the hectare as the common unit that can be used with the SI.
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.