Convert barn [b] to square mil [mil^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.

Square Mil [mil²]

A square mil (mil²) is a very small unit of area used mainly in engineering and manufacturing, especially for measuring the cross-sectional area of wires and thin materials.

• 
  

  1 mil = 1/1000 of an inch (0.001 inch)

  
  
• 
  

  1 square mil = (0.001 inch)² = 0.000001 square inches (in²)

  
  
• 
  

  1 square mil ≈ 6.4516 × 10⁻¹⁰ square meters (m²)

  
  

Square mils are useful for precise measurements in electronics and materials science.