Convert square hectometer [hm^2] to barn [b] Online | Free area Converter
Square Hectometer [hm²]
A square hectometer (hm²) is a unit of area equal to a square with sides 1 hectometer (100 meters) long.
1 hm² = 10,000 m² = 1 hectare (ha).
It is used to measure large areas like fields or forests, similar to hectares.
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.