A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Barns to Square Terameters Converter — b to Tm2
Convert Barn (b) to Square Terameter (Tm2) using the exact conversion factor (1 barn = 1e-52 square terameter). See the formula, worked examples, and conversion table.
Barns to Square Terameters 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+24.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Barns to Square Terameters
Comparing Barn and Square Terameter 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 terameters = barns × 1e-52
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 terameter equals 1e+24 base units, so dividing one by the other gives the direct barn-to-square terameter factor of 1e-52.
Simple example
1 b × 1e-52 = 1e-52 Tm2
1 barn = 1e-52 square terameters.
Real-world example
10 b × 1e-52 = 1e-51 Tm2
10 barns = 1e-51 square terameters.
Conversion table
| Barn (b) | Square Terameter (Tm2) |
|---|---|
| 1 b | 1e-52 Tm2 |
| 5 b | 5e-52 Tm2 |
| 10 b | 1e-51 Tm2 |
| 25 b | 2.5e-51 Tm2 |
| 50 b | 5e-51 Tm2 |
| 100 b | 1e-50 Tm2 |
Reverse conversion: Square Terameter to Barn
1e-52 Tm2 × 1e+52 = 1 b
1e-52 square terameters = 1 barn.
barns = square terameters × 1e+52
For a page dedicated to this direction, see Square Terameter to Barn.
Understanding the Barn (b)
A barn is a nuclear cross-section unit equal to 1e-28 square meters.
Understanding the Square Terameter (Tm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square terameters are in 1 barn?
1 barn equals 1e-52 square terameters, using the exact defined conversion factor rather than an estimate.
How do I convert barn to square terameter?
Multiply the barn value by 1e-52. The converter above does this instantly to whatever precision you set.
How do I convert square terameter back to barn?
Use the reverse factor: 1 square terameter equals 1e+52 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 terameter?
Square Terameter (Tm2) is a unit of area.
Is the barn to square terameter conversion exact?
Yes. Both barn and square terameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-52 used above is exact to as many digits as you choose to display.