Convert barn [b] to square rod (US survey) Online | Free area Converter

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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 Rod (US Survey)


A square rod (US survey) is a unit of area based on the US survey foot and rod, used primarily in land surveying in the United States.



  • 1 US survey rod = 16.5 US survey feet (exactly 16.5 feet)



  • 1 square rod (US survey) = 16.5 ft × 16.5 ft = 272.25 square feet ≈ 25.2929 m²



The US survey square rod is slightly different in exact length than the international measurement due to the foot definition but is essentially used the same way for land measurement.




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