Square metric area unit.
Square Decameters to Barns Converter — dam2 to b
Convert Square Decameter (dam2) to Barn (b) using the exact conversion factor (1 square decameter = 1e+30 barn). See the formula, worked examples, and conversion table.
Square Decameters 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 100 / 1e-28.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Decameters to Barns
Comparing Square Decameter 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 decameters × 1e+30
This factor comes from each unit's defined relationship to the category's base unit: 1 square decameter equals 100 base units, and 1 barn equals 1e-28 base units, so dividing one by the other gives the direct square decameter-to-barn factor of 1e+30.
Simple example
1 dam2 × 1e+30 = 1e+30 b
1 square decameter = 1e+30 barns.
Real-world example
10 dam2 × 1e+30 = 1e+31 b
10 square decameters = 1e+31 barns.
Conversion table
| Square Decameter (dam2) | Barn (b) |
|---|---|
| 1 dam2 | 1e+30 b |
| 5 dam2 | 5e+30 b |
| 10 dam2 | 1e+31 b |
| 25 dam2 | 2.5e+31 b |
| 50 dam2 | 5e+31 b |
| 100 dam2 | 1e+32 b |
Reverse conversion: Barn to Square Decameter
1e+30 b × 1e-30 = 1 dam2
1e+30 barns = 1 square decameter.
square decameters = barns × 1e-30
For a page dedicated to this direction, see Barn to Square Decameter.
Understanding the Square Decameter (dam2)
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 decameter?
1 square decameter equals 1e+30 barns, using the exact defined conversion factor rather than an estimate.
How do I convert square decameter to barn?
Multiply the square decameter value by 1e+30. The converter above does this instantly to whatever precision you set.
How do I convert barn back to square decameter?
Use the reverse factor: 1 barn equals 1e-30 square decameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square decameter?
Square Decameter (dam2) is a unit of area.
What is a barn?
Barn (b) is a unit of area.
Is the square decameter to barn conversion exact?
Yes. Both square decameter and barn are defined by fixed standards rather than physical artifacts, so the factor of 1e+30 used above is exact to as many digits as you choose to display.