## ››Convert barn to square metre

 barn square meter

How many barn in 1 square meter? The answer is 1.0E+28.
We assume you are converting between barn and square metre.
You can view more details on each measurement unit:
barn or square meter
The SI derived unit for area is the square meter.
1 barn is equal to 1.0E-28 square meter.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between barns and square meters.
Type in your own numbers in the form to convert the units!

## ››Want other units?

You can do the reverse unit conversion from square meter to barn, or enter any two units below:

## Enter two units to convert

 From: To:

## ››Definition: Barn

A barn is a unit of area, abbreviated mostly as "bn", equal to 10-28 m2. 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.

## ››Definition: Square meter

A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. It is the SI unit of area. It is abbreviated m².

## ››Metric conversions and more

ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!