 Convert Square Metres (m²) to Barns (b) | m² in b
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# Let's convert Square Metres (m²) to Barns (b)

This quick and easy calculator will convert Square Metres (m²) to Barns (b) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Square Metres to Barns

Formula
b = m² x 1.0E+28
Quick Rough Maths
To get the Barns, multiply the number of Square Metres by 1.0E+16 trillion
Square Metres (m²) in 1 barn
There are 0 Square Metres in 1 barn
Barns (b) in 1 Square Metre
There are 1.0E+28 Barns in 1 Square Metre

## Unit Information

Square Metre
/skwɛːˌˈmiːtə/
Symbol:
Unit System: SI

### What is the Square Metre?

The square metre is a unit of area and is an SI derived unit with the symbol m².

It was introduced in 1954 when the International System of Units was established and was derived directly from one of the original 6 base units - the metre (m).

It can be prefixed with any of the SI symbols that multiply it up or down such as km² (square kilometre) or µm2 (square micrometre). It is the most commonly used unit of area and is recognised all over the world.

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.