Square metric area unit.
Square Decimeters to Barns Converter — dm2 to b
Convert Square Decimeter (dm2) to Barn (b) using the exact conversion factor (1 square decimeter = 1e+26 barn). See the formula, worked examples, and conversion table.
Square Decimeters to Barns 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.
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Result = input x 0.01 / 1e-28.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Decimeters to Barns
Comparing Square Decimeter and Barn 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: Square metric area unit, and a barn is a nuclear cross-section unit equal to 1e-28 square meters.
Formula
barns = square decimeters × 1e+26
This factor comes from each unit's defined relationship to the category's base unit: 1 square decimeter equals 0.01 base units, and 1 barn equals 1e-28 base units, so dividing one by the other gives the direct square decimeter-to-barn factor of 1e+26.
Simple example
1 dm2 × 1e+26 = 1e+26 b
1 square decimeter = 1e+26 barns.
Real-world example
10 dm2 × 1e+26 = 1e+27 b
10 square decimeters = 1e+27 barns.
Conversion table
| Square Decimeter (dm2) | Barn (b) |
|---|---|
| 1 dm2 | 1e+26 b |
| 5 dm2 | 5e+26 b |
| 10 dm2 | 1e+27 b |
| 25 dm2 | 2.5e+27 b |
| 50 dm2 | 5e+27 b |
| 100 dm2 | 1e+28 b |
Reverse conversion: Barn to Square Decimeter
1e+26 b × 1e-26 = 1 dm2
1e+26 barns = 1 square decimeters.
square decimeters = barns × 1e-26
For a page dedicated to this direction, see Barn to Square Decimeter.
Understanding the Square Decimeter (dm2)
Square metric area unit.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many barns are in 1 square decimeter?
1 square decimeter equals 1e+26 barns, using the exact defined conversion factor rather than an estimate.
How do I convert square decimeter to barn?
Multiply the square decimeter value by 1e+26. The converter above does this instantly to whatever precision you set.
How do I convert barn back to square decimeter?
Use the reverse factor: 1 barn equals 1e-26 square decimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square decimeter?
Square Decimeter (dm2) is a unit of area.
What is a barn?
Barn (b) is a unit of area.
Is the square decimeter to barn conversion exact?
Yes. Both square decimeter and barn are defined by fixed standards rather than physical artifacts, so the factor of 1e+26 used above is exact to as many digits as you choose to display.