Area units calculator & converter tool
Dm2 Conversions Table
Equivalent of 20 dm2 (Square decimeter): |
0.2 m2 (Square meter) |
2000 cm2 (Square centimeter) |
200000 mm2 (Square milimeter) |
2.0E-7 km2 (Square Kilometer) |
2.0E-5 Hectare |
0.002 Are |
0.0002 Decare |
0.2 Centiare |
5.8501E-5 Arpent |
200 Barn |
2.15278 Square feet |
4.9421E-5 Acre |
0.00790738 Square perche |
7.722E-8 Square mil |
0.239198 Square yard |
310.00092551925 Square inch |
2.146E-9 Canton |
3.088E-7 Homestead |
0.00019768 Rood |
Dm2 / Barn Units Definition
dm2 (Square decimeter)
Therefore, a square decimeter (or "square decimeter" in British spelling) is one tenth of a square meter. It can also be expressed by ten square centimeters. A rough example of a decimeter could be the average surface area of some smartphone screens.
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.