A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Barns to Square Rontometers Converter — b to rm2
Convert Barn (b) to Square Rontometer (rm2) using the exact conversion factor (1 barn = 1e+26 square rontometer). See the formula, worked examples, and conversion table.
Barns to Square Rontometers 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-54.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Barns to Square Rontometers
Comparing Barn and Square Rontometer 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 rontometers = barns × 1e+26
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 rontometer equals 1e-54 base units, so dividing one by the other gives the direct barn-to-square rontometer factor of 1e+26.
Simple example
1 b × 1e+26 = 1e+26 rm2
1 barn = 1e+26 square rontometers.
Real-world example
10 b × 1e+26 = 1e+27 rm2
10 barns = 1e+27 square rontometers.
Conversion table
| Barn (b) | Square Rontometer (rm2) |
|---|---|
| 1 b | 1e+26 rm2 |
| 5 b | 5e+26 rm2 |
| 10 b | 1e+27 rm2 |
| 25 b | 2.5e+27 rm2 |
| 50 b | 5e+27 rm2 |
| 100 b | 1e+28 rm2 |
Reverse conversion: Square Rontometer to Barn
1e+26 rm2 × 1e-26 = 1 b
1e+26 square rontometers = 1 barns.
barns = square rontometers × 1e-26
For a page dedicated to this direction, see Square Rontometer to Barn.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Understanding the Square Rontometer (rm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square rontometers are in 1 barn?
1 barn equals 1e+26 square rontometers, using the exact defined conversion factor rather than an estimate.
How do I convert barn to square rontometer?
Multiply the barn value by 1e+26. The converter above does this instantly to whatever precision you set.
How do I convert square rontometer back to barn?
Use the reverse factor: 1 square rontometer equals 1e-26 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 rontometer?
Square Rontometer (rm2) is a unit of area.
Is the barn to square rontometer conversion exact?
Yes. Both barn and square rontometer 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.