**Definitions:**

**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.

**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.

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

*Example: How many double square feet are equivalent to 12.2 double square inches?*

As;

1 double square inches = 4.8224537041667E-5 double square feet

12.2 double square inches = Y double square feet

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

Y equals 12.2 times 4.8224537041667E-5 over 1

(i.e.) Y = 12.2 * 4.8224537041667E-5 / 1 = 0.00058833935190833 double square feet

Answer is: 0.00058833935190833 double square feet are equivalent to 12.2 double square inches.

*Practice Question: Convert the following units into ft4:*

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

( i ) 67.49 in4

( ii ) 28.71 in4

( iii ) 97.91 in4