Convert barn [b] to square foot (US survey) 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.

Square Foot (US Survey)

The square foot (US survey) is a unit of area based on the US survey foot, which is slightly longer than the international foot. It is mainly used in land surveying and mapping in the United States.

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  1 US survey foot = 1200⁄3937 meters (approximately 0.3048006096 m)

  
  
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  1 square foot (US survey) ≈ 0.0929034116 m²

  
  

This unit helps maintain consistency in US land measurements, especially in legal and cadastral contexts.