Convert barns to square millimeters

Explanation

From this page you can convert barns to square millimeters (or b to mm²) simply, by using the application above.

In case you are wondering, to convert from barns to square millimeters you need to multiply by 1 × 10^-22. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 b=1 × 10^-22 mm²

barnsb

dimension	area
symbol	b

The barn (b) is a unit of area used in nuclear physics. It is roughly equal to the cross-section of a uranium nucleus.

Definition

One barn is 100 fm² or 10^–28 m².

The International System of Units 8^th edition p. 127

Equivalences

The barn is such a small unit it is quite hard to find anything close, we are going to have to resort to the power of exponents once more.

square millimetersmm²

dimension	area
system	International system of units (SI)
symbol	mm², sq mm

The square millimeter (mm², sq mm) is a derived area unit in the International System of Units.

Definition of the square millimeter

One square millimeter is a superficial area equivalent to that of a square whose sides are one millimeter long.

Equivalences

One square millimeter is equivalent to:

SI Area Units

square millimeter	mm²	0.000001
square centimeter	cm²	0.0001
square meter	m²	1
square kilometer	km²	1000000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.