Convert Barns (b) to Square Kilometres (km²) | b in km²

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# Let's convert Barns (b) to Square Kilometres (km²)

This quick and easy calculator will convert Barns (b) to Square Kilometres (km²) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Barns to Square Kilometres

Formula
km² = b / 1.0E+34
Quick Rough Maths
To get the Square Kilometres, divide the number of Barns by 1.0E+22 trillion
Barns (b) in 1 Square Kilometre
There are 1.0E+34 Barns in 1 Square Kilometre
Square Kilometres (km²) in 1 barn
There are 0 Square Kilometres in 1 barn

## Unit Information

barn
/bɑːn/
Symbol: b
Unit System: Particle Physics

### What is the barn?

The barn is a unit of area and is used in particle physics with the symbol b.

It represents approximately the area of the cross-section of a uraneum nucleus, so is very small compared to most other recognised units of area.

It is also used to measure the interaction of a nucleus with an electric field gradient in nuclear quadrupole and magnetic resonance.

Square Kilometre
/skwɛːˌˈkɪləˌmiːtə,kɪˈlɒmɪtə/
Symbol: km²
Unit System: SI

### What is the Square Kilometre?

The square kilometre is a unit of area and is a multiple of the square metre; an SI derived unit. It has the symbol km².

A square kilometre is equal to the area of a square with edges 1km long. There are 1,000,000 square metres in a square kilometre.

Square kilometres are often used to describe expansive areas of land due to the large unit size.

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