Area units calculator & converter tool
Barn Conversions Table
Equivalent of 7 Barn: |
0.007 m2 (Square meter) |
70 cm2 (Square centimeter) |
0.7 dm2 (Square decimeter) |
7000 mm2 (Square milimeter) |
7.0E-9 km2 (Square Kilometer) |
7.0E-7 Hectare |
7.0E-5 Are |
7.0E-6 Decare |
0.007 Centiare |
2.047535E-6 Arpent |
0.0753473 Square feet |
1.729735E-6 Acre |
0.0002767583 Square perche |
2.7027E-9 Square mil |
0.00837193 Square yard |
10.850032393174 Square inch |
7.511E-11 Canton |
1.0808E-8 Homestead |
6.9188E-6 Rood |
Barn / Rood Units Definition
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.
Rood
Rood is an English unit of area equal to one quarter of an acre or 10,890 square feet, exactly 1,011.7141056 m2. A rectangle that is one furlong (i.e., 10 chains, or 40 rods) in length and one rod in width is one rood in area, as is any space comprising 40 perches (a perch being one square rod).