Convert barn [b] to square rod 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 Rod


A square rod (also called a perch or pole) is a unit of area used in land measurement. It is the area of a square with each side one rod long.



  • 1 rod = 16.5 feet (5.029 meters)



  • 1 square rod = 16.5 ft × 16.5 ft = 272.25 square feet ≈ 25.29 square meters



  • 160 square rods = 1 acre



Square rods were historically used in surveying and property descriptions.




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