Barn to Are Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Barn to Are
To convert barns to m²: multiply by 10⁻²⁸. To fm²: multiply by 100.
1 b = 10⁻²⁸ m² = 100 fm². Millibarns (mb), microbarns (µb), and nanobarns (nb) are common submultiples.
For example, 1 Barn (b) = 1.000000e-30 Are (a).
Barn to Are — Common Values
| Barn (b) | Are (a) |
|---|---|
| 0.1 | 1.000000e-31 |
| 0.5 | 5.000000e-31 |
| 1 | 1.000000e-30 |
| 2 | 2.000000e-30 |
| 5 | 5.000000e-30 |
| 10 | 1.000000e-29 |
| 25 | 2.500000e-29 |
| 50 | 5.000000e-29 |
| 100 | 1.000000e-28 |
| 500 | 5.000000e-28 |
| 1000 | 1.000000e-27 |
About Barn (b)
Definition
The barn is a unit of area equal to 10⁻²⁸ m², used to express nuclear cross-sections — the effective target area of subatomic particles.
Mathematical Relationship
1 b = 10⁻²⁸ m² = 100 fm². Millibarns (mb), microbarns (µb), and nanobarns (nb) are common submultiples.
Conversion Formula
To convert barns to m²: multiply by 10⁻²⁸. To fm²: multiply by 100.
Practical Applications
Quantifying nuclear reaction probabilities, neutron absorption, and particle scattering in reactor design.
Interesting Facts
The physicists named it 'barn' as a joke: nuclei were 'as big as a barn' compared to what they expected. Later units include 'outhouse' (10⁻⁶ barns) and 'shed' (10⁻²⁴ barns).
Common Mistakes
Thinking a barn is a large area — at the human scale 10⁻²⁸ m² is incomprehensibly small.
Educational Tips
Cross-section = probability of interaction. A bigger barn value means a particle is more likely to 'hit the target' — hence the barn analogy.
About Are (a)
Definition
The are is a metric unit of area equal to 100 square meters — the area of a square with 10-meter sides.
Mathematical Relationship
1 a = 100 m² = 0.01 ha = 1 dam². 100 ares = 1 hectare.
Conversion Formula
To convert ares to m²: multiply by 100. To hectares: divide by 100. To acres: multiply by 0.0247.
Practical Applications
Small garden plots, residential lots in some European land records, and educational exercises.
Interesting Facts
The word 'hectare' literally means '100 ares.' Despite the are's obscurity, its derivative hectare is used worldwide.
Common Mistakes
Confusing 'are' with 'acre.' An are = 100 m², while an acre = 4,046.86 m² — an acre is about 40× larger.
Educational Tips
Remember: 1 are = 10 m × 10 m = 100 m². And 1 hectare = 100 ares = 10,000 m². The naming is systematic.