Area units calculator & converter tool
Km2 Conversions Table
Equivalent of 13 km2 (Square Kilometer): |
13000000 m2 (Square meter) |
130000000000 cm2 (Square centimeter) |
1300000000 dm2 (Square decimeter) |
13000000000000 mm2 (Square milimeter) |
1300 Hectare |
130000 Are |
13000 Decare |
13000000 Centiare |
3802.565 Arpent |
13000000000 Barn |
139930700 Square feet |
3212.365 Acre |
513979.7 Square perche |
5.0193 Square mil |
15547870 Square yard |
20150060158.751 Square inch |
0.13949 Canton |
20.072 Homestead |
12849.2 Rood |
Km2 / Barn Units Definition
km2 (Square Kilometer)
The square kilometer (km2) is a unit of measurement of area. One square kilometer is equal to the area of a square whose sides measure one kilometer.
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.