An are is 100 square meters.
Ares to Barns Converter — a to b
Convert Are (a) to Barn (b) using the exact conversion factor (1 are = 1e+30 barn). See the formula, worked examples, and conversion table.
Ares 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 Ares to Barns
Comparing Are 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: An are is 100 square meters, and a barn is a nuclear cross-section unit equal to 1e-28 square meters.
Formula
barns = ares × 1e+30
This factor comes from each unit's defined relationship to the category's base unit: 1 are equals 100 base units, and 1 barn equals 1e-28 base units, so dividing one by the other gives the direct are-to-barn factor of 1e+30.
Simple example
1 a × 1e+30 = 1e+30 b
1 are = 1e+30 barns.
Real-world example
10 a × 1e+30 = 1e+31 b
10 ares = 1e+31 barns.
Conversion table
| Are (a) | Barn (b) |
|---|---|
| 1 a | 1e+30 b |
| 5 a | 5e+30 b |
| 10 a | 1e+31 b |
| 25 a | 2.5e+31 b |
| 50 a | 5e+31 b |
| 100 a | 1e+32 b |
Reverse conversion: Barn to Are
1e+30 b × 1e-30 = 1 a
1e+30 barns = 1 are.
ares = barns × 1e-30
For a page dedicated to this direction, see Barn to Are.
Understanding the Are (a)
An are is 100 square meters.
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 are?
1 are equals 1e+30 barns, using the exact defined conversion factor rather than an estimate.
How do I convert are to barn?
Multiply the are value by 1e+30. The converter above does this instantly to whatever precision you set.
How do I convert barn back to are?
Use the reverse factor: 1 barn equals 1e-30 ares. You can also use the swap control in the converter above to flip the direction instantly.
What is a are?
Are (a) is a unit of area.
What is a barn?
Barn (b) is a unit of area.
Is the are to barn conversion exact?
Yes. Both are 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.