Convert Square Kilometers to Barns
Convert Square Kilometers (km²) to Barns (b) instantly and accurately.
Conversion Formula
b = km² × 1.000000000e+34
About Square Kilometers
A square kilometer (km²) is a metric unit of area equal to a square with sides of one kilometer (1,000 m × 1,000 m). It is used for measuring large land areas such as cities, forests, lakes, and countries. Manhattan (New York) is about 59 km², and Monaco (the second smallest country) is just over 2 km². This unit is essential in geography, urban planning, forestry, and environmental impact studies.
About Barns
A barn (b) is a unit of area used in nuclear and particle physics to measure effective cross-sections of atomic nuclei and particle interaction probabilities. Equal to 10⁻²⁸ m² (10⁻²⁴ cm²), it was humorously named during the Manhattan Project - physicists joked that uranium nuclei were 'as big as a barn' at the subatomic scale. Particle physics experiments at accelerators like CERN report cross-sections in millibarns (mb), microbarns (μb), nanobarns (nb), and femtobarns (fb).
Quick Reference Table
| Square Kilometers (km²) | Barns (b) |
|---|---|
| 1 km² | 1 × 1034 b |
| 2 km² | 2 × 1034 b |
| 5 km² | 5 × 1034 b |
| 10 km² | 1 × 1035 b |
| 25 km² | 2.5 × 1035 b |
| 50 km² | 5 × 1035 b |
| 100 km² | 1 × 1036 b |