Square metric area unit.
Square Micrometers to Barns Converter — um2 to b
Convert Square Micrometer (um2) to Barn (b) using the exact conversion factor (1 square micrometer = 1e+16 barn). See the formula, worked examples, and conversion table.
Square Micrometers 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 1e-12 / 1e-28.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Micrometers to Barns
Comparing Square Micrometer 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 micrometers × 1e+16
This factor comes from each unit's defined relationship to the category's base unit: 1 square micrometer equals 1e-12 base units, and 1 barn equals 1e-28 base units, so dividing one by the other gives the direct square micrometer-to-barn factor of 1e+16.
Simple example
1 um2 × 1e+16 = 1e+16 b
1 square micrometer = 1e+16 barns.
Real-world example
10 um2 × 1e+16 = 1e+17 b
10 square micrometers = 1e+17 barns.
Conversion table
| Square Micrometer (um2) | Barn (b) |
|---|---|
| 1 um2 | 1e+16 b |
| 5 um2 | 5e+16 b |
| 10 um2 | 1e+17 b |
| 25 um2 | 2.5e+17 b |
| 50 um2 | 5e+17 b |
| 100 um2 | 1e+18 b |
Reverse conversion: Barn to Square Micrometer
1e+16 b × 1e-16 = 1 um2
1e+16 barns = 1 square micrometer.
square micrometers = barns × 1e-16
For a page dedicated to this direction, see Barn to Square Micrometer.
Understanding the Square Micrometer (um2)
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 micrometer?
1 square micrometer equals 1e+16 barns, using the exact defined conversion factor rather than an estimate.
How do I convert square micrometer to barn?
Multiply the square micrometer value by 1e+16. The converter above does this instantly to whatever precision you set.
How do I convert barn back to square micrometer?
Use the reverse factor: 1 barn equals 1e-16 square micrometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a square micrometer?
Square Micrometer (um2) is a unit of area.
What is a barn?
Barn (b) is a unit of area.
Is the square micrometer to barn conversion exact?
Yes. Both square micrometer and barn are defined by fixed standards rather than physical artifacts, so the factor of 1e+16 used above is exact to as many digits as you choose to display.