Convert circular inch to hectare [ha] Online | Free area Converter

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Circular Inch


A circular inch is a unit of area used primarily in engineering and wire gauge measurements. It represents the area of a circle with a diameter of one inch.



  • Formula: Area = π × (radius)²



  • Since the radius is half an inch,

    Area = π × (0.5 in)² = π × 0.25 in² ≈ 0.7854 square inches (in²).



Circular inches are often used to specify cross-sectional areas of wires or pipes.


Hectare [ha]


A hectare (ha) is a unit of area commonly used in land measurement. It equals 10,000 square meters or a square that is 100 meters on each side.

1 hectare = 10,000 m² = 0.01 square kilometers.

Hectares are often used to measure fields, farms, and large plots of land.




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