Barns to square centimeters
Type a value in b to get it in cm² instantly.
1×10⁻²⁴cm²
That's 100,000,000,000,000,000,000× as big as a neutrino interaction, while ordinary neutron scattering is 4× bigger. A disc that size would have a radius of about 5.642 fm.
Convert the other way: cm² to b
What it means
How big a target is that?
A cross section is an effective area, not a physical one. A strongly absorbing nucleus can present a target far larger than itself.
The math
How to convert b to cm²
To convert barns to square centimeters, multiply by 1×10⁻²⁴.
Example: 1 b × 1×10⁻²⁴ = 1×10⁻²⁴ cm².
In the other direction, 1 cm² = 1×10²⁴ b.
Every unit
Your cross section in every unit
Tables
b to cm² conversion table
| b | cm² |
|---|---|
| 0.001 b | 1×10⁻²⁷ cm² |
| 0.01 b | 1×10⁻²⁶ cm² |
| 0.1 b | 1×10⁻²⁵ cm² |
| 1 b | 1×10⁻²⁴ cm² |
| 10 b | 1×10⁻²³ cm² |
| 100 b | 1×10⁻²² cm² |
| 585 b | 5.85×10⁻²² cm² |
| 1,000 b | 1×10⁻²¹ cm² |
| 10,000 b | 1×10⁻²⁰ cm² |
| 1,000,000 b | 1×10⁻¹⁸ cm² |
cm² to b conversion table
| cm² | b |
|---|---|
| 0.001 cm² | 1×10²¹ b |
| 0.01 cm² | 1×10²² b |
| 0.1 cm² | 1×10²³ b |
| 1 cm² | 1×10²⁴ b |
| 10 cm² | 1×10²⁵ b |
| 100 cm² | 1×10²⁶ b |
| 585 cm² | 5.85×10²⁶ b |
| 1,000 cm² | 1×10²⁷ b |
| 10,000 cm² | 1×10²⁸ b |
| 1,000,000 cm² | 1×10³⁰ b |
Quick answers
Quick answers
- How many cm² is 1 b?
- 1 b is 1×10⁻²⁴ cm².
- How many cm² is 10 b?
- 10 b is 1×10⁻²³ cm².
The units
About these units
Barns (b)
10⁻²⁸ m², roughly the area of a heavy nucleus.
Square centimeters (cm²)
The CGS form, as reaction rate formulas usually want it.
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