A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Barns to Square Centimeters Converter — b to cm2
Convert Barn (b) to Square Centimeter (cm2) using the exact conversion factor (1 barn = 1e-24 square centimeter). See the formula, worked examples, and conversion table.
Barns to Square Centimeters converter
Converter
Area Converter
Convert land, construction, mapping, survey, and scientific area units.
Context values
Some unit families need one extra value for a physically accurate result.
Square metric area unit.
Result = input x 1e-28 / 0.0001.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Barns to Square Centimeters
Comparing Barn and Square Centimeter is common in agriculture and real estate, where US land is typically measured in acres and most of the rest of the world uses hectares. Specifically: A barn is a nuclear cross-section unit equal to 1e-28 square meters, and square metric area unit.
Formula
square centimeters = barns × 1e-24
This factor comes from each unit's defined relationship to the category's base unit: 1 barn equals 1e-28 base units, and 1 square centimeter equals 0.0001 base units, so dividing one by the other gives the direct barn-to-square centimeter factor of 1e-24.
Simple example
1 b × 1e-24 = 1e-24 cm2
1 barn = 1e-24 square centimeters.
Real-world example
10 b × 1e-24 = 1e-23 cm2
10 barns = 1e-23 square centimeters.
Conversion table
| Barn (b) | Square Centimeter (cm2) |
|---|---|
| 1 b | 1e-24 cm2 |
| 5 b | 5e-24 cm2 |
| 10 b | 1e-23 cm2 |
| 25 b | 2.5e-23 cm2 |
| 50 b | 5e-23 cm2 |
| 100 b | 1e-22 cm2 |
Reverse conversion: Square Centimeter to Barn
1e-24 cm2 × 1e+24 = 1 b
1e-24 square centimeters = 1 barn.
barns = square centimeters × 1e+24
For a page dedicated to this direction, see Square Centimeter to Barn.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Understanding the Square Centimeter (cm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square centimeters are in 1 barn?
1 barn equals 1e-24 square centimeters, using the exact defined conversion factor rather than an estimate.
How do I convert barn to square centimeter?
Multiply the barn value by 1e-24. The converter above does this instantly to whatever precision you set.
How do I convert square centimeter back to barn?
Use the reverse factor: 1 square centimeter equals 1e+24 barns. You can also use the swap control in the converter above to flip the direction instantly.
What is a barn?
Barn (b) is a unit of area.
What is a square centimeter?
Square Centimeter (cm2) is a unit of area.
Is the barn to square centimeter conversion exact?
Yes. Both barn and square centimeter are defined by fixed standards rather than physical artifacts, so the factor of 1e-24 used above is exact to as many digits as you choose to display.