How many barn in 1 square millimeter?
The answer is 1.0E+22.
We assume you are converting between barn and square millimetre.
You can view more details on each measurement unit: barn or
square millimeter
The SI derived unit for area is the square meter.
1 square meter is equal to 1.0E+28 barn, or 1000000 square millimeter.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between barns and square millimeters.
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You can do the reverse unit conversion from
square millimeter to barn, or enter any two units below:

A barn is a unit of area, abbreviated mostly as "bn", equal to 10^{-28} m^{2}. Although not an official SI unit, it is widely used by nuclear physicists, since it is convenient for expressing the cross sectional area of nuclei and nuclear reactions. A barn is approximately equal to the area of a uranium nucleus.

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