Convert barn [b] to square mile [mi^2] Online | Free area Converter

Barn [b]


A barn (b) is a very small unit of area used mainly in nuclear and particle physics to measure the cross-sectional area of atomic nuclei and particles.

1 barn = 10⁻²⁸ square meters (m²).

The name "barn" humorously refers to something “as big as a barn” in the tiny world of atomic scales, despite its extremely small size.


ChatGPT said:

Square Mile [mi²]


A square mile (mi²) is a unit of area used primarily in the United States and the UK to measure large land areas. It represents a square that is one mile long on each side.

1 square mile = 2.59 square kilometers = 640 acres.

Square miles are commonly used to describe the size of cities, counties, and large geographic regions.





Popular Area Unit Conversions

Convert barn [b] to Other Area Units