# Convert Double Square Foot to Double Square Inch (ft4 to in4)

In next fields, kindly type your value in the text box under title [ From: ] to convert from double square foot to double square inch (ft4 to in4). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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Definitions:

Double Square Foot (abbreviation: ft4): is an imperial unit and U.S. customary unit (non-SI, non-metric) of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.

Double Square Inch (abbreviations: in4, or in 4): is a unit in the (British) imperial and United States customary systems of measurement of area moment of inertia, a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis.

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## How to Convert Double Square Feet to Double Square Inches

### Example: How many double square inches are equivalent to 68.29 double square feet?

As;

1 double square feet = 20736 double square inches

68.29 double square feet = Y double square inches

Assuming Y is the answer, and by criss-cross principle;

Y equals 68.29 times 20736 over 1

(i.e.) Y = 68.29 * 20736 / 1 = 1416061.44 double square inches

Answer is: 1416061.44 double square inches are equivalent to 68.29 double square feet.

### Practice Question: Convert the following units into in4:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 18.93 ft4

( ii ) 96.03 ft4

( iii ) 20.75 ft4

References
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