A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Barns to Roods Converter — b to rood
Convert Barn (b) to Rood (rood) using the exact conversion factor (1 barn = 9.884215e-32 rood). See the formula, worked examples, and conversion table.
Barns to Roods 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 rood is one quarter of an acre.
Result = input x 1e-28 / 1011.714106.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Barns to Roods
Comparing Barn and Rood 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 a rood is one quarter of an acre.
Formula
roods = barns × 9.884215e-32
This factor comes from each unit's defined relationship to the category's base unit: 1 barn equals 1e-28 base units, and 1 rood equals 1011.7141056 base units, so dividing one by the other gives the direct barn-to-rood factor of 9.884215e-32.
Simple example
1 b × 9.884215e-32 = 9.884215e-32 rood
1 barn = 9.884215e-32 roods.
Real-world example
10 b × 9.884215e-32 = 9.884215e-31 rood
10 barns = 9.884215e-31 roods.
Conversion table
| Barn (b) | Rood (rood) |
|---|---|
| 1 b | 9.884215e-32 rood |
| 5 b | 4.942108e-31 rood |
| 10 b | 9.884215e-31 rood |
| 25 b | 2.471054e-30 rood |
| 50 b | 4.942108e-30 rood |
| 100 b | 9.884215e-30 rood |
Reverse conversion: Rood to Barn
9.884215e-32 rood × 1.011714e+31 = 0.9999999738 b
9.884215e-32 roods = 0.9999999738 barns.
barns = roods × 1.011714e+31
For a page dedicated to this direction, see Rood to Barn.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Understanding the Rood (rood)
A rood is one quarter of an acre.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many roods are in 1 barn?
1 barn equals 9.884215e-32 roods, using the exact defined conversion factor rather than an estimate.
How do I convert barn to rood?
Multiply the barn value by 9.884215e-32. The converter above does this instantly to whatever precision you set.
How do I convert rood back to barn?
Use the reverse factor: 1 rood equals 1.011714e+31 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 rood?
Rood (rood) is a unit of area.
Is the barn to rood conversion exact?
Yes. Both barn and rood are defined by fixed standards rather than physical artifacts, so the factor of 9.884215e-32 used above is exact to as many digits as you choose to display.