A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Barns to Square Picometers Converter — b to pm2
Convert Barn (b) to Square Picometer (pm2) using the exact conversion factor (1 barn = 0.0001 square picometer). See the formula, worked examples, and conversion table.
Barns to Square Picometers 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 / 1e-24.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Barns to Square Picometers
Comparing Barn and Square Picometer 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 picometers = barns × 0.0001
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 picometer equals 1e-24 base units, so dividing one by the other gives the direct barn-to-square picometer factor of 0.0001.
Simple example
1 b × 0.0001 = 0.0001 pm2
1 barn = 0.0001 square picometers.
Real-world example
10 b × 0.0001 = 0.001 pm2
10 barns = 0.001 square picometers.
Conversion table
| Barn (b) | Square Picometer (pm2) |
|---|---|
| 1 b | 0.0001 pm2 |
| 5 b | 0.0005 pm2 |
| 10 b | 0.001 pm2 |
| 25 b | 0.0025 pm2 |
| 50 b | 0.005 pm2 |
| 100 b | 0.01 pm2 |
Reverse conversion: Square Picometer to Barn
0.0001 pm2 × 10000 = 1 b
0.0001 square picometers = 1 barn.
barns = square picometers × 10000
For a page dedicated to this direction, see Square Picometer to Barn.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Understanding the Square Picometer (pm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square picometers are in 1 barn?
1 barn equals 0.0001 square picometers, using the exact defined conversion factor rather than an estimate.
How do I convert barn to square picometer?
Multiply the barn value by 0.0001. The converter above does this instantly to whatever precision you set.
How do I convert square picometer back to barn?
Use the reverse factor: 1 square picometer equals 10,000 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 picometer?
Square Picometer (pm2) is a unit of area.
Is the barn to square picometer conversion exact?
Yes. Both barn and square picometer are defined by fixed standards rather than physical artifacts, so the factor of 0.0001 used above is exact to as many digits as you choose to display.