Convert acre [ac] to circular inch Online | Free area Converter

Acre [ac]

An acre (ac) is a unit of area commonly used in the United States and other countries for measuring land. One acre equals 43,560 square feet or about 4,047 square meters.

1 acre ≈ 0.4047 hectares or 0.004047 square kilometers.

Acres are often used to describe the size of farms, plots, and real estate.

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.