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    Cin

    Conversions to other units

    1 circular inch | 0.005454 ft^2 (square feet)
 | 0.7854 in^2 (square inches)
 | 5.067 cm^2 (square centimeters)
 | 506.7 mm^2 (square millimeters)
 | 5.067×10^-4 m^2 (square meters)

    Conversions from other units

    1 ft^2 | 183.3 circular inches
1 in^2 | 1.273 circular inches
1 cm^2 | 0.1974 circular inches
1 mm^2 | 0.001974 circular inches
1 m^2 | 1974 circular inches

    Physical quantity

    area

    Unit systems

    UK imperial | UK circular

    Basic unit dimensions

    [length]^2

    Corresponding quantities for 1 circular inch

    Radius r of a circle from A = πr^2:
 | 0.5 inches
 | 13 mm (millimeters)

    Radius r of a sphere from A = 4πr^2:
 | 0.25 inches
 | 6.4 mm (millimeters)

    Edge length a of a square from A = a^2:
 | 0.8862 inches
 | 22.51 mm (millimeters)

    Comparisons for 1 circular inch as area

     ≈ ( 0.045 ≈ 1/22 ) × area of one side of a compact disc ( 0.01131 m^2 )

     ≈ 0.46 × area of a human retina ( ≈ 0.0011 m^2 )

     ≈ area of a typical postage stamp ( ≈ 5 cm^2 )

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