Square metric area unit.
Square Petameters to Barns Converter — Pm2 to b
Convert Square Petameter (Pm2) to Barn (b) using the exact conversion factor (1 square petameter = 1e+58 barn). See the formula, worked examples, and conversion table.
Square Petameters 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+30 / 1e-28.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Petameters to Barns
Comparing Square Petameter 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 petameters × 1e+58
This factor comes from each unit's defined relationship to the category's base unit: 1 square petameter equals 1e+30 base units, and 1 barn equals 1e-28 base units, so dividing one by the other gives the direct square petameter-to-barn factor of 1e+58.
Simple example
1 Pm2 × 1e+58 = 1e+58 b
1 square petameter = 1e+58 barns.
Real-world example
10 Pm2 × 1e+58 = 1e+59 b
10 square petameters = 1e+59 barns.
Conversion table
| Square Petameter (Pm2) | Barn (b) |
|---|---|
| 1 Pm2 | 1e+58 b |
| 5 Pm2 | 5e+58 b |
| 10 Pm2 | 1e+59 b |
| 25 Pm2 | 2.5e+59 b |
| 50 Pm2 | 5e+59 b |
| 100 Pm2 | 1e+60 b |
Reverse conversion: Barn to Square Petameter
1e+58 b × 1e-58 = 1 Pm2
1e+58 barns = 1 square petameters.
square petameters = barns × 1e-58
For a page dedicated to this direction, see Barn to Square Petameter.
Understanding the Square Petameter (Pm2)
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 petameter?
1 square petameter equals 1e+58 barns, using the exact defined conversion factor rather than an estimate.
How do I convert square petameter to barn?
Multiply the square petameter value by 1e+58. The converter above does this instantly to whatever precision you set.
How do I convert barn back to square petameter?
Use the reverse factor: 1 barn equals 1e-58 square petameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square petameter?
Square Petameter (Pm2) is a unit of area.
What is a barn?
Barn (b) is a unit of area.
Is the square petameter to barn conversion exact?
Yes. Both square petameter and barn are defined by fixed standards rather than physical artifacts, so the factor of 1e+58 used above is exact to as many digits as you choose to display.